Moving Things In One Frame Breaks The Other Frames

Sorry to post 2 problems in such quick succession, but I’ve encountered yet another problem that I’m sure has a very simple, obvious fix.

In a nutshell, I move something in layer 1 frame 13 for example, and on frame 14 various layers have been moved, and I can’t just move them back into place because then it will move frame 13’s layers to a strange position.

The Marquee Tool seems to hate me, any help would be great, thanks. <3

Are those cells linked by any chance? If they’re linked, their icons will be linked in a black line instead of just being separate circles.

If they’re not linked, make sure you have only the one cell selected by clicking it, it’s possible you selected multiple cels by mistake.

This is what they look like, don’t think they’re linked.
It’s also not a mistake, I’ve restarted the program multuple times too, and I’ve been trying not to select more than the one.

make a video. its easy even if you can download hypercam or pull up your phone and film it. upload to youtube. post link here. (trust me itll take you a total of 5 minutes. just download hypercam 2 (i think its 2 anyways) or film with phone)) should take 0.40 seconds to upload to youtube