So basically, I made a skin in Pmcskin3d (on mobile I might add), and when I hit "upload to PMC", it worked (duh lol), except, the skin arms were broken, (as if someone uploaded a 3 pixel arm skin and selected 4 pixels arm), and the second layer was none existent (except for the head, which was weird, because the rest was broken.

Anyway

To fix this, I hit edit in Pmcskin3d, downloaded the broken skin, inspected the file, (the Arms looked correct), and hit new skin, then open file. I then hit upload to PMC, and then update existing

(In case anyone wanted to know how to fix it lol)