My Radisson conversion just posted, and it shows an activity date one day earlier than I actually performed the transaction. Fortunately it's still well after my registration date, so I assume I'll be okay with this counting as a hit without having to follow up.

To make things easy, you might try calling goldpoints plus, explaining the situation, and asking if they can do a one point transfer as a courtesy (assuming they have the ability to do so). My guess is that this would more easily solve your problem than asking US to straighten it out.