I know the purchase limit for one person is 15K. What about household limit? my wife started to purchase as well, and now both me and her having troubles (like cannot checkout). I never had that problem when I was ordering only for me.
The $15k limit is per GCM account. That said, I haven't been able to order from any one of my three GCM accounts since last weekend. I get the "Transaction not completed. Please feel free to contact us" error. I wonder if GCM did a sweep of accounts with the same delivery address and froze them. That would be consistent with your problem.