After Effects importing 60 fps footage at 30,000 fps?

I was looking around the forums for an answer online and tried various solutions but it seems that my problem is not quite the same.

I recorded some iPhone footage for a project (using a Mac and Quicktime player) and what normally happens is that when I import it, the footage has always been recorded at 60fps. On my computer one of my recordings was 55 seconds and when imported it stayed the same.

However NOW for some reason when I import the footage the frame rate is a little more random. Some of my footage is 90.49 fps and my most recent footage is at 30,000 fps. Not only is the frame rate incorrect but when imported the video is not even the fully recorded version. At first I thought I needed to interpret the footage but changing it to the correct frame rate did not solve the problem of my footage not being the full recording.

I figured I may have recorded the footage wrong. But I haven't done anything different than I normally have, and all of the footage was from the same day and some even minutes apart. Some of that footage is the correct 60fps, but then some footage in between isn't? Does anyone know why this is happening? It's not a huge priority as sometimes when I record I still manage to get the 60 fps frame rate I'm looking for, but it is frustrating when I spend some time recording only to find out it can't be used in After Effects for...whatever reason.