Ive got this model and hes pretty much fully skinned however theres parts like the thigh were its skinned fully but there's some weight on the other side as well. So i got rid of it and mirrored it, it came back. Why is this happening??

Here's my model...please help me out and let me know what other areas need to be skinned better

https://www.mediafire.com/download/d5...fj/Rig_Done.ma