As a programmer, I know that to write the perfect software you have to outguess anything that any user will ever do - an impossible task!
It seems that the programmers failed to imagine that Johny User would create bid groups, add in snipes, win items and then, 3 weeks later, try using the bid group again.
In fact, they're probably tucked-up in bed with the assumption that no-one would be so stupid as to try that obviously ridiculous and illogical method of re-using a bid group. Hang on, I'm an IT person and I've tried to do just that! Doh!!!
Hopefully, now that this has been highlighted they will set up some sort of flag that will not allow the use of a bidgroup if it has been used and satisfied it's criteria (ie. one item bought or whatever). Or put up a message. Or something. Anything that will stop people trying to reuse the bidgroup and being disappointed when they don't win.
Action: Support