I think it's been open until 20:00 up until now I think. I've been able to pop in after the gym after work on occasions which has been handy. Also, opening at 10:00 is bad as I sometimes pop in before work.
The problem with Leeds is that when the travel office is closed, you can't buy AP's in the main booking office. Perhaps this is something that should be amended, given that these are times when it's going to be less busy.
I don't really trust the internet for financial transactions, and asking someone at the office tends to be less hassle I find.