Unity imports index finger incorrectly - beyond logic

problem: http://answers.unity3d.com/questions/1383431/unity-imports-index-finger-incorrectly-beyond-logi.html

I am completely riddled as how to fix this issue. Multiple people have the same problem without any help or replies whatsoever. I have almost given up on Blender since it seems as if this problem cannot be solved by the user.

please help