Another set of successes
Just wanted to report the usual. Two vanilla Platinum cards two Aspire cards. Charged $900 across the four in chunks of $100 and $50 on Jan 6, meter moved on all cards on Jan 10, and credit posted on Jan 11. I should add that all four cards are part of my United payment cards list so I didn't have to add them when charging.
Thanks to all for posting their experiences. Good luck to others.