In the next update unreal engine should be much more compatible with blender. When ever i try to add skeletal meshes to unreal engine as an fbx file i always get some problem with the mesh. Example: i get the multiple root bone problem and when i fix it the mesh it self looks like a mutated human rather than the original human i created. Please fix 
That’s an issue with the Blender FBX exporter, not UE4
@TheDuckDude
I fixxed all my Blender workflow root problems with that Blender to UDK Player Model – Kris Redbeard
Thanks for replying