Yep, that was it! Guess I didn't know what trim did, that seemed to have fixed it. For some reason I thought trim had something to do with the animation length and not the image size. Apologies, haha.
When I export as a sprite sheet, I want every sprite to be exactly 192x192. My canvas is also set to that. The sprite sheet ends up being randomly different, like 195x182 for example, and my sprite slowly goes off-center. How do I fix this??