it is unlikely you have seen 6,500 $. Reason is that the increase has been of 1,000 at the time, so you would have seen 6,000. But also when the CT was announced, the feature to add self driving opened at 7K till July 31; after that 8,000, so you just miss adding it for a 1k cheaper.
Your Payment Showing on your CC statement must be from Tesla Merchandise, because the CT deposit is and was only 100 dollars...You may wan to check into that again.