I've been exporting my video work-in-progresses at 480x270 to see how they look without taking up too much space. They sync perfectly fine. Then I tried exporting a WIP at the original quality, 1920x1080, and it's suddenly incredibly sped up! (The video is only 40 secs long normally, but it's 33 secs at the higher quality!) I exported the exact same project at 480x270 right after I noticed this, and it works perfectly fine.
Is there any solution for this? I can't find anything about this and I'd really like for the problem to not just be that my computer's not strong enough since I can't use my project on anyone else's. Thank you!