HI, I have a 7 night, category 6 hotel certificate (part of the hotel + air package). I now want to upgrade it to category 7. When I look at the site that lists cost for category 6 versus category 7 certificate it looks like only 30k more points needed. However when I just called Marriott to do this they told me it would be 105k extra points. Has anyone else upgraded a certificate and can tell me if they had this same issue? Any advice?