Thanks for the reply.

No, nothing untoward. I played, went to bed, got up logged in for a quick play before work & they were gone...all I did was go to sleep. No updates, nothing. I thought maybe I had been hacked but with the one-time password & also the fact that I get password-lockout if anyone outside my country tries to get in I doubt this is the case (although I am no expert!).

Ah well, they have all been reset now manually, so hopefully it won't happen again. I was just a little bit curious as to how it could happen in the first place.