PantherPete - go in and make a reservation (any res) for your 180 day date. You can cancel later if needed. When you do this, the system will ask you to sign in - even though it looks like you are already logged in. Once you do this and complete the 180 day reservation, refresh and you should see your +10 days available to make reservations. I did this and it worked for me. Was a frustrating way to figure out how to finagle the system into working, but hope it helps.