Years ago I went to Hawaii shortly after we were married for a conference. Stayed a couple extra days at the swanky Princeville hotel on Kauai. The Friday night before departure we went to dinner offsite and the restaurant told me my card had maxed out. Didn’t seem possible so I gave them another and decided I’d call the bank on (then) Saturday morning east coast time to clear it up.
so at like 2 am I get I call them, and they tell me I’m thousands of dollars over my limit, and I tell them that’s impossible But now I’m starting to worry about getting home on my flight that day. Amazingly, the bank says don’t sweat it, we’ll just raise your limit to get you out of there. (!)
so about a week after I got back I got a call from the bank. They tell me that on departure day, when the princeville hotel had processed my charges in anticipation of checkout, there was a glitch at a bank of Hawaii processing switch, and that on that day, for many cardholders, every transaction had been processed 10x.