Speaking of multiple payment accounts, have there been issues using one payment account/statement period but not the same source pay from month to month?

I've generally tried to keep the same source/bank per credit card for at least a few months, but when ramping up MS (like the last couple of weeks during the OM/OD deals) it often involves extra steps & pushing the money around to get it to the same old source payment checking account. Likewise, when Serve & Redbird were alive & well I had made notes on my spreadsheet and tried to use the same Serve/Redbird account to billpay the same credit card, i.e. Redbird1 > ccX.