I was working on this for quite a few hours, when some of the frames turned into each other. I tried to fix it. I did, then it happened again. I don't know how to fix it, so I just gave up on it.

Those squiggly lines on some frames are because I was trying to mark them in order to try and fix the problem... I wish it hadn't glitched. Pretty sure I spent 2-3 hours working on that