diff --git a/ProteoformSuiteInternal/Proteoform.cs b/ProteoformSuiteInternal/Proteoform.cs
index ba15a8d3..c2f8f6a7 100644
--- a/ProteoformSuiteInternal/Proteoform.cs
+++ b/ProteoformSuiteInternal/Proteoform.cs
@@ -301,8 +301,8 @@ private void assign_pf_identity(ExperimentalProteoform e, PtmSet set, Proteoform
                     }
                 }
             }
-            //if already been assigned -- check if gene name != this gene name ==> ambiguous
-            else if (!e.topdown_id && (e.gene_name.get_prefered_name(Lollipop.preferred_gene_label) != this.gene_name.get_prefered_name(Lollipop.preferred_gene_label)))
+            else if (!e.topdown_id && e.gene_name.get_prefered_name(Lollipop.preferred_gene_label) != this.gene_name.get_prefered_name(Lollipop.preferred_gene_label)
+             && e.linked_proteoform_references.Count == this.linked_proteoform_references.Count + 1)
             {
                 e.ambiguous = true;
             }
@@ -315,6 +315,8 @@ private void assign_pf_identity(ExperimentalProteoform e, PtmSet set, Proteoform
             {
                 e.gene_name.gene_names.Concat(this.gene_name.gene_names);
             }
+
+
         }
 
         #endregion Private Methods
diff --git a/Test/TestProteoformIdentification.cs b/Test/TestProteoformIdentification.cs
index 9ae3b6d2..82911c5f 100644
--- a/Test/TestProteoformIdentification.cs
+++ b/Test/TestProteoformIdentification.cs
@@ -301,7 +301,7 @@ public void ambiguous_experimentals()
             Assert.AreEqual(3, fam.experimental_proteoforms.Count);
             Assert.AreEqual(2, fam.theoretical_proteoforms.Count);
             Assert.AreEqual(2, fam.gene_names.Count);
-            Assert.IsTrue(e2.ambiguous); //dont have same path length, still ambiguous
+            Assert.IsFalse(e2.ambiguous); //dont have same path length, not ambiguous
             Assert.IsFalse(e1.ambiguous);
             Assert.IsTrue(e3.ambiguous);
         }