Hi -
I am subscribed to 30 days subscription. Here is it billed on my billing history, from 9th of May:
5/9/2014 30 Day Subscription
Now my account summary show I have 39 days remaining:
Game Time Remaining
You have 39 days of game time remaining.
Billing Date
You will be billed on July 8, 2014 for £8.99GBP
It looks like I now have 30 days free? It wasn't like this a few days ago.