diff --git a/code/Common/Exporter.cpp b/code/Common/Exporter.cpp
index b9bd0409b..25a78114f 100644
--- a/code/Common/Exporter.cpp
+++ b/code/Common/Exporter.cpp
@@ -445,7 +445,7 @@ aiReturn Exporter::Export( const aiScene* pScene, const char* pFormatId, const c
 
                 ExportProperties emptyProperties;  // Never pass NULL ExportProperties so Exporters don't have to worry.
                 ExportProperties* pProp = pProperties ? (ExportProperties*)pProperties : &emptyProperties;
-                pProp->SetPropertyBool("bJoinIdenticalVertices", must_join_again);
+        		pProp->SetPropertyBool("bJoinIdenticalVertices", pp & aiProcess_JoinIdenticalVertices);
                 exp.mExportFunction(pPath,pimpl->mIOSystem.get(),scenecopy.get(), pProp);
 
                 pimpl->mProgressHandler->UpdateFileWrite(4, 4);
diff --git a/code/FBX/FBXExporter.cpp b/code/FBX/FBXExporter.cpp
index 9767f9a0a..413d1d6c8 100644
--- a/code/FBX/FBXExporter.cpp
+++ b/code/FBX/FBXExporter.cpp
@@ -1860,6 +1860,7 @@ void FBXExporter::WriteObjects ()
             sdnode.AddChild("Version", int32_t(100));
             sdnode.AddChild("UserData", "", "");
 
+            std::set<int32_t> setWeightedVertex;
             // add indices and weights, if any
             if (b) {
                 std::vector<int32_t> subdef_indices;
@@ -1867,7 +1868,8 @@ void FBXExporter::WriteObjects ()
                 int32_t last_index = -1;
                 for (size_t wi = 0; wi < b->mNumWeights; ++wi) {
                     int32_t vi = vertex_indices[b->mWeights[wi].mVertexId];
-                    if (vi == last_index) {
+                    bool bIsWeightedAlready = (setWeightedVertex.find(vi) != setWeightedVertex.end());
+                    if (vi == last_index || bIsWeightedAlready) {
                         // only for vertices we exported to fbx
                         // TODO, FIXME: this assumes identically-located vertices
                         // will always deform in the same way.
@@ -1877,6 +1879,7 @@ void FBXExporter::WriteObjects ()
                         // identical vertex.
                         continue;
                     }
+                    setWeightedVertex.insert(vi);
                     subdef_indices.push_back(vi);
                     subdef_weights.push_back(b->mWeights[wi].mWeight);
                     last_index = vi;
diff --git a/code/glTF2/glTF2Asset.inl b/code/glTF2/glTF2Asset.inl
index 99f8c876f..55a3e5833 100644
--- a/code/glTF2/glTF2Asset.inl
+++ b/code/glTF2/glTF2Asset.inl
@@ -270,13 +270,14 @@ Ref<T> LazyDict<T>::Retrieve(unsigned int i)
         throw DeadlyImportError("GLTF: Object at index \"" + to_string(i) + "\" is not a JSON object");
     }
 
-    T* inst = new T();
+    // Unique ptr prevents memory leak in case of Read throws an exception
+    auto inst = std::unique_ptr<T>(new T());
     inst->id = std::string(mDictId) + "_" + to_string(i);
     inst->oIndex = i;
     ReadMember(obj, "name", inst->name);
     inst->Read(obj, mAsset);
 
-    return Add(inst);
+    return Add(inst.release());
 }
 
 template<class T>