Thanks Littledude for the feedback. The first thing I did was check the IP, and it is our works server. I don't play on work PC, but my mobile connects through the wifi. The thing is, the time recorded was c. 6:30pm, and we leave work at 5:30pm (but I'm guessing that could be a time zone thing, dunno where the report comes from?).
I just can't figure it out. My first thought was someone at work had got hold of my phone, and "for a laugh" released my best players, but they all swear blind they hadn't. It has pretty much ruined the game for me though, being left with a threadbare squad (only 2 defenders!). I've built it back up a little, but languish now in 10th in the league