It's possible they closed out of the window and opened it again without being in incognito while you were away? Because yes that would be why the error occured again here. Are you off at 3 or 3:30? If 3 I'll move this over to caleb to work on and have him leave detailed updates for Monday.
If 3:30 let's pause here and empty inbox and then rectify monday as I think it may take slightly longer than the 20 minutes left in the day today. No charges are going through between now and Monday so we are okay to pick this back up next week. Can you put all of this info including order numbers that may have been processed to the wrong person (linked to the order) in a shared ticket for all three of us to have access to