From experiences with trades, particularly one with alh, if there is a glitch in the trade make sure to check after that all the cards migrated. alh sent me an offer and when I saw it at first I didn't think much of all the duplicate requests in it because he usually trades for multiple base cards of star players to give out to the kids he coaches. As I was pulling the cards I was confused as to why most of the cards he requested two or more of I only had one copy in my trade boxes, and then I checked my collection inventory on the site and sure enough I only had one copy of the ones I was missing listed here. After fixing the trade in the offers section and sending back and forth when the trade was accepted I thought nothing of it. Next trade I get some of the same cards (which I discovered by searching and searching my trade boxes with no success, and then I found them in alh's pile waiting to be packaged) were requested. They didn't go to the "In transaction" grey status...none of them. When the trade was accepted, sent, recieved, etc... every card in that trade didn't migrate on my end, but every card on his end did. Long story long, when the trade is done, even the new one, be sure to manually check the cards on the site in your collection to make sure all went according to plan. I had another issue a few weeks ago where cards requested I could not find (and I am now pretty confident it was from glitches in the past where cards did not migrate) did not remove from the trade when I removed them using the trade tools. They "reappeared." We all make organizing mistakes when we can't find cards we have for trade, but this one was so unique (a 1965 O-Pee-Chee baseball card) and the way I store my vintage for trade there is no way I could have accidentally put it in the wrong box, as my vintage for trade is not in a box but a binder. It had to of not been removed by the site after a trade. What I have learned from this is to always use the check collection feature on completed trades. With your trade "glitchy" be sure to check that.