Strange Behavior Part 1

About a week I ago I started noticing that when I started up Premiere Pro, the bin that was open when I saved and closed down the night before was not open when I started the project the next day. This is very large project with over 13,000 elements. It didn't bother me at first because all else seem well and I would just open the bin again. This was not limited to any particular bin but to anyone I had open and closed with at the end of the day. Then yesterday things got scary. I just finished a rather lengthy audio edit in audition and exported the results back to Premiere which went smooth enough. I closed down for lunch. When I started back up premiere pro couldn't find three audio files. When I looked on the hard drive, the audio elements in the folders were gone? I found them in three new folders marked "Unknown Artist". Looking at the time of creation it appeared to have happened during the last session. That's end of part 1, part 2 things become frightening.
I am using Premiere Pro CS6 running on i7-3930K intel, NVIDIA Quadro 4000, 24GIGs RAM and 8GIG G-Tech RAID 0.
Any thoughts?