I have had similar issues, i was once looking for refills of my checkbook(checks) they were in a file cabinet... I looked twice three times through the whole cabinet, even started saying to the wife 'what the hell did ya do with my checks..." she was like "wha?.." I agressively emtied the file cabinet(threw everything across the room) and flipped the damned thing in its side and there they were laying underneath it. It was a spectacle and the room was tore apart but i found the checks LOL! apparently they fell out of the drawer and ebnded up on the arpet underneath as the bottom of the cabinet was open. yeah the wife thought I was going to blow a fuse that time...LOL!