Strange Import Issue with Canon 7D Footage Final Cut Pro X

I'm hoping some folks can help me here as I'm stumped.

I shot around 60 minutes of last evening with my Canon 7D. File sizes ranged from 500MB to 4GB. I imported from my 8GB memory card a 3.6 GB file and a 500MB file with no issue. I then moved on to my 16GB memory card, which was full with around 7 clips, and started importing. I noticed the import was going slow but I was also importing some audio from SD cards on the same card reader, which I've always done in the past, and figured it was just a USB 2.0 bandwidth thing.

I then got an error regarding the Import Failing (see attachment) but the file appeared to have imported without issue. Upon further inspection during the import however, I noticed any file larger than 1GB was showing as the PAL codec (after it imports it correctly shows H.264 but more on that later). I checked the 3.6GB file from my first import and it did not share this issue. While on the shoot I had backed up a number of these files to my iPad so I attempted to import them from there and althought he PAL codec was not listed, I did get the Import Failed error. I also tried a brand new card reader and a different Event/Destination the issue remained.

I've restarted, repaired permissions, and the issue remains. I have never encountered this error and imported a similar amount of footage and clip sizes two weeks ago. I'm stumped, has anyone else seen this?