Black ops save game gone?

Ok so I was at home playing black ops this morning and made a few check points but did not save due to having to rush out. I am now at my girls house trying to resume my campaign but when I go into campaign "resumeN is gone. However my save file still appears. I use a USB memory card to travel with my games to friends houses. I'm about half way through the campaign on veteran so this is ticking me off. Was there some kind of patch released recently that would cause this since my gf is not on xbox live currently? Also, if I go to mission select it seems to be unlocked up to the point I was last at, could I just restart from here and still get the veteran achievement?

Halp.

Ok so I was at home playing black ops this morning and made a few check points but did not save due to having to rush out. I am now at my girls house trying to resume my campaign but when I go into campaign "resumeN is gone. However my save file still appears. I use a USB memory card to travel with my games to friends houses. I'm about half way through the campaign on veteran so this is ticking me off. Was there some kind of patch released recently that would cause this since my gf is not on xbox live currently? Also, if I go to mission select it seems to be unlocked up to the point I was last at, could I just restart from here and still get the veteran achievement?

honduh666

The games is like 4 hours long; personally, I see no problem here. If the game was fun, I don't see why you are complaining that you have to play it again.

Yes its a fun game, but I don't want to have to do it all over. I've already seen it and it will just bore me until I get back to where I was.