I fixed it, it was really weird because I used the scaling tool in gimp to resize it and made a new version and that didn't work, but the other scaling tool under images > scale image worked just fine
I retried it though except I scaled using the scale tool and then did "fit canvas to layers"
I also used these settings and turned them all off so there's no metadata that sets the forums security off. this was a weird glitch and it's nothing like I've ever dealt with before, resizing/waiting/compression/ctrl f5 didn't work this time so I'm pretty sure the image was screwed somehow