OK so I switched over to a larger hard drive yesterday, and I used xfsdump and xfsrestore to switch everything over, used it for every partition. I had some files that I wanted to work with on the old drive, so I mounted my old home partition to /mnt/hd/
And this is where it gets funny...after I mounted it, I noticed some files that should have been exclusive to the new drive, they were created before the drive was even mounted. /mnt/hd/user is acting like a mirror of /home/user If I mkdir in /home/user, the directory is created in /mnt/hd/user as well. I've umounted and remounted the partition, still the same. There is no symbolic linking going on. What the hell is this, anybody know?

Nevermind. I'm a genius and I forgot to edit the new fstab file to reflect the system changes. I thought /dev/hdb8 was being mounted as /home, but really it was mounting /dev/hda8. Then when I used the mount command myself, I was simply mounting /dev/hda8 to /mnt/hd as well...didn't know you could do that, interesting. Well I just stayed up an extra half hour to delete all my damn video files because I thought they weren't supposed to be on that drive, hurray