diff --git a/Sieve/Services/SievePropertyMapper.cs b/Sieve/Services/SievePropertyMapper.cs
index f9c1837..c3b8fc2 100644
--- a/Sieve/Services/SievePropertyMapper.cs
+++ b/Sieve/Services/SievePropertyMapper.cs
@@ -4,20 +4,19 @@ using System.Collections.Generic;
 using System.Linq;
 using System.Linq.Expressions;
 using System.Reflection;
-using System.Text;
 
 namespace Sieve.Services
 {
 	public class SievePropertyMapper
     {
-        private readonly Dictionary<Type, Dictionary<PropertyInfo, ISievePropertyMetadata>> _map
-            = new Dictionary<Type, Dictionary<PropertyInfo, ISievePropertyMetadata>>();
+        private readonly Dictionary<Type, ICollection<KeyValuePair<PropertyInfo, ISievePropertyMetadata>>> _map
+            = new Dictionary<Type, ICollection<KeyValuePair<PropertyInfo, ISievePropertyMetadata>>>();
 
         public PropertyFluentApi<TEntity> Property<TEntity>(Expression<Func<TEntity, object>> expression)
         {
             if(!_map.ContainsKey(typeof(TEntity)))
             {
-                _map.Add(typeof(TEntity), new Dictionary<PropertyInfo, ISievePropertyMetadata>());
+                _map.Add(typeof(TEntity), new List<KeyValuePair<PropertyInfo, ISievePropertyMetadata>>());
             }
 
             return new PropertyFluentApi<TEntity>(this, expression);
@@ -65,13 +64,16 @@ namespace Sieve.Services
 
             private void UpdateMap()
             {
-                _sievePropertyMapper._map[typeof(TEntity)][_property] = new SievePropertyMetadata()
+                var metadata = new SievePropertyMetadata()
                 {
                     Name = _name,
                     FullName = _fullName,
                     CanFilter = _canFilter,
                     CanSort = _canSort
                 };
+                var pair = new KeyValuePair<PropertyInfo, ISievePropertyMetadata>(_property, metadata);
+
+                _sievePropertyMapper._map[typeof(TEntity)].Add(pair);
             }
 
             private static (string, PropertyInfo) GetPropertyInfo(Expression<Func<TEntity, object>> exp)
@@ -105,8 +107,8 @@ namespace Sieve.Services
                 var result = _map[typeof(TEntity)]
                     .FirstOrDefault(kv =>
                     kv.Value.Name.Equals(name, isCaseSensitive ? StringComparison.Ordinal : StringComparison.OrdinalIgnoreCase)
-                    && (canSortRequired ? kv.Value.CanSort : true)
-                    && (canFilterRequired ? kv.Value.CanFilter : true));
+                    && (!canSortRequired || kv.Value.CanSort)
+                    && (!canFilterRequired || kv.Value.CanFilter));
 
                 return (result.Value?.FullName, result.Key);
             }
diff --git a/SieveUnitTests/Entities/Comment.cs b/SieveUnitTests/Entities/Comment.cs
index e3418be..b914f28 100644
--- a/SieveUnitTests/Entities/Comment.cs
+++ b/SieveUnitTests/Entities/Comment.cs
@@ -1,5 +1,6 @@
 using System;
 using Sieve.Attributes;
+using SieveUnitTests.ValueObjects;
 
 namespace SieveUnitTests.Entities
 {
@@ -7,6 +8,10 @@ namespace SieveUnitTests.Entities
     {
         public int Id { get; set; }
 
+        public Name AuthorFirstName { get; set; }
+
+        public Name AuthorLastName { get; set; }
+
         [Sieve(CanFilter = true, CanSort = true)]
         public DateTimeOffset DateCreated { get; set; } = DateTimeOffset.UtcNow;
 
diff --git a/SieveUnitTests/General.cs b/SieveUnitTests/General.cs
index 1a22fb0..1c5e96b 100644
--- a/SieveUnitTests/General.cs
+++ b/SieveUnitTests/General.cs
@@ -7,6 +7,7 @@ using Sieve.Models;
 using Sieve.Services;
 using SieveUnitTests.Entities;
 using SieveUnitTests.Services;
+using SieveUnitTests.ValueObjects;
 
 namespace SieveUnitTests
 {
@@ -63,17 +64,23 @@ namespace SieveUnitTests
                 new Comment() {
                     Id = 0,
                     DateCreated = DateTimeOffset.UtcNow.AddDays(-20),
-                    Text = "This is an old comment."
+                    Text = "This is an old comment.",
+                    AuthorFirstName = new Name("FirstName1"),
+                    AuthorLastName = new Name("LastName1")
                 },
                 new Comment() {
                     Id = 1,
                     DateCreated = DateTimeOffset.UtcNow.AddDays(-1),
-                    Text = "This is a fairly new comment."
+                    Text = "This is a fairly new comment.",
+                    AuthorFirstName = new Name("FirstName2"),
+                    AuthorLastName = new Name("LastName2")
                 },
                 new Comment() {
                     Id = 2,
                     DateCreated = DateTimeOffset.UtcNow,
-                    Text = "This is a brand new comment. ()"
+                    Text = "This is a brand new comment. ()",
+                    AuthorFirstName = new Name("FirstName3"),
+                    AuthorLastName = new Name("LastName3")
                 },
             }.AsQueryable();
         }
@@ -365,5 +372,20 @@ namespace SieveUnitTests
             Assert.AreEqual(posts[2].Id, 2);
             Assert.AreEqual(posts[3].Id, 1);
         }
+
+        [TestMethod]
+        public void NestedFilteringWithIdenticTypesWorks()
+        {
+            var model = new SieveModel()
+            {
+                Filters = "(firstName|lastName)@=*2",
+            };
+
+            var result = _processor.Apply(model, _comments);
+            Assert.AreEqual(1, result.Count());
+
+            var comment = result.First();
+            Assert.AreEqual(comment.Id, 1);
+        }
     }
 }
diff --git a/SieveUnitTests/Services/ApplicationSieveProcessor.cs b/SieveUnitTests/Services/ApplicationSieveProcessor.cs
index 2910352..9f43617 100644
--- a/SieveUnitTests/Services/ApplicationSieveProcessor.cs
+++ b/SieveUnitTests/Services/ApplicationSieveProcessor.cs
@@ -31,6 +31,14 @@ namespace SieveUnitTests.Services
             mapper.Property<Post>(p => p.OnlySortableViaFluentApi)
                 .CanSort();
 
+            mapper.Property<Comment>(c => c.AuthorFirstName.Value)
+                .CanFilter()
+                .HasName("firstName");
+
+            mapper.Property<Comment>(c => c.AuthorLastName.Value)
+                .CanFilter()
+                .HasName("lastName");
+
             return mapper;
         }
     }
diff --git a/SieveUnitTests/ValueObjects/Name.cs b/SieveUnitTests/ValueObjects/Name.cs
new file mode 100644
index 0000000..58fa0e2
--- /dev/null
+++ b/SieveUnitTests/ValueObjects/Name.cs
@@ -0,0 +1,43 @@
+using System;
+
+namespace SieveUnitTests.ValueObjects
+{
+    public sealed class Name : IEquatable<Name>
+    {
+        public Name(string value)
+        {
+            if (string.IsNullOrEmpty(value))
+            {
+                throw new InvalidOperationException("Invalid string!");
+            }
+
+            if (value.Length > 50)
+            {
+                throw new InvalidOperationException("String exceeds maximum name length!");
+            }
+
+            Value = value;
+        }
+
+        public string Value { get; private set; }
+
+        public bool Equals(Name other)
+        {
+            if (ReferenceEquals(null, other)) return false;
+            if (ReferenceEquals(this, other)) return true;
+            return string.Equals(Value, other.Value);
+        }
+
+        public override bool Equals(object obj)
+        {
+            if (ReferenceEquals(null, obj)) return false;
+            if (ReferenceEquals(this, obj)) return true;
+            return obj is Name && Equals((Name) obj);
+        }
+
+        public override int GetHashCode()
+        {
+            return (Value != null ? Value.GetHashCode() : 0);
+        }
+    }
+}