Bossland,
I'm having the same problem. Purchased a 30 day gatherbuddy pass, but when checking out was redirected back to the site to find out i was invoiced for 3 30 day passes. I've paid for the one 30 day pass already, but i think the other 2 unpaid invoices is what's causing me to get the Not Paid when trying to log in. I sent a pm to you with the transaction details.