Incorrect Membership dates and emails

1.I am an admin on our BWANH.ORG site. I also had a membership with BWANH. I tried to renew my membership and although I clicked on the $100 membership level the next screen showed me a $50 value. It also did not have a button to press to continue the process. (So I was stuck.) When I logged in with a different email address and "joined" for the first time I could complete the process. I really need to fix this as we have members we want to renew using the site.