Project Event duration bug

[absempere]

I'm re-creating an old AudiAnnotate project on the new application and ran into an issue with the media duration. The original media was over an hour long, but when I load the .mp4 from the item manifest into the new application, it detects only 5 minutes of the video, even though it's the exact same manifest and .mp4 file link. Since the application detects the duration at 5 minutes, I'm unable to edit it. Any ideas? (I ended up finding a different version of the film uploaded to the Internet Archive and used that in the new project, but this still seems like a weird case??) 
 
Relatedly, I noticed when trying to enter an item's duration in the import event page (NOT via the Event spreadsheet upload), the time will automatically round up to an incorrect time and generally acts funky when I'm trying to edit it...