Forum Subscription

My subscription is due for renewal
I followed the link but it only lets me do the £5 option.
i am sure last year i just paid the £15.
Do I pay the five and then upgrade or is there another way

 

Just followed your link still only lets me select £5

 

I think what I am doing wrong is trying to pay too early. It doesn't expire till the 8th
Last year I paid £5 then a few days later paid for the upgrade