Wait a minute. I thought the accouunt looked ok when you looked at it previously? And all of a sudden something is unpaid for the day bloody complains (which is not in question)? And this unpaid for item spans multiple accounts and credit card numbers but the account looks ok to you? this seems like a slippery sloap here, but feasble.
teedubbya has probably only ordered one or two things thing in the last couple years. it would seem odd timing to say the least, and can't amout to much if anything.
that said, iffn teedubbya owes anything he says feel free to email or call him and he'll fix it immediately. Snailmail, tele, email whatever. You have all his current information. He will be glad to review things and if there is a glitch on his end fix it, if it is on your end he will point it out. At this point it could be either but there sure are a lot of coinkadinks.