To follow up: I wasn't registered originally so called the Platinum line and spoke to a CSR. She looked saw that I wasn't registered and immediately registered me. Not sure if it would've gone through anyway by the end of the day or Sept 11 as someone had mentioned in a previous post or not, but there was no argument, etc.

I assume the site gets updated every night b/c this morning the 35K/20 nights promo was showing in my account.