I have done virtually every possible combination of cards, ping-pongs, completed circles, Amex/Chase/Citi/Barclays, same card on multiple accounts, even multiple accounts in the same name. Only thing never done is the same bank account on 2+ accounts.

Never had a problem except for something that looked like a website glitch.

Going to sit in the comfy chair, lie on some soft pillows, and watch a St. Louis game. Nyah! Might even wash some dishes.