These are quite nice edits.
That texture issue on the backs and sides of your player are from the decal bleeding to far towards the edges of the decal. The player body doesn't actually use the entire space of the decal texture, a considerable amount is cut off, especially on the top and bottom. If too much stuff is in these spaces it causes that weird texture glitch you're seeing. The glitch can easily be fixed by cutting off the excess decal that can't be seen on the player.
Edit: they also don't seem to be packaged properly in the link you posted.
Decals must be packaged as the zip Decal_Name.zip, and then the contents of that zip is all of the decals, as well as a thumbs folder with all the icons. No extra folders
double Edit: I fixed the problem and repackaged it for you. Hopefully what I said makes sense and will help you in the future <3
http://www.mediafire.com/download/iodghwkrej39ka7/Decal_JacketHoodies.zip