I guess it depends who runs the online website. When I called up, they said it was being looked at. I just renewed over the phone, very easy and I have an email confirming that my seat is still mine. I just wanted to get it done before I forgot and missed the deadline.
I am in the same boat. So I called them on 0844 327 1901 and took option 7. They said you can't renew online yet, but were happy to do it over the phone. I have renewed my ticket for next season :albion2: