Ooops. Seconds after posting this thread I got a helpful reply to a PM I sent, from Steve Weiss. The forum told me he'd gone offline so I decided to make a thread, anyway it's here now and could possibly help others so I'll leave it be.
As I suspected, Steve thinks this may well be a one-touch button related issue and will try and clear it up for me.
I must say, it's top service from Novak!
Stu