doczeke - what your seeing are errors. Somoene I think put the wrong sheet up for stamping (or more than likely they had the order wrong in the print sequence).
While not totally common, they're far from being rare. Some sell on ebay for a few bucks, others don't. I'm sending mine off to COMC in hopes that maybe I can get a buck or two on them from assorted player collectors.
Retail packs are totally hit or miss. But as you said, its a ton of fun opening the packs..and with 200 it does take some time. Some products will lend themselves better ot hits than others. My biggest return was on the Classcis as I pulled in auto from there. But hold our your luck on the Threads packs for a gu jsy. Prestigue also had a fair number of inserts.
Blowouts Resident Wade Boggs Super Collector