I've done some sneakin' in the saves and mails and I have found that:
Dec 17 (turn 77) TNT has not philo and CoL
Dec 19 (turn 77) we offer TNT to trade for philo and CoL (Nuts has the save)
Dec 20 6AM donsig sends reply that they don't want philo, only CoL
Dec 20 6.01AM donsig posts TNT's turn 78 in turn tracker
Dec 21 Chamnix posts "Turn 78 unzipped, whistled at, and packed off to K.I.S.S."
Dec 22, when we get turn 78, TNT is no longer missing philo
What has happend is that as soon as TNT recieves our proposal, they contacted MIA. Then, within turn 78, they make a trade including TNT gets philo from MIA and MIA get something to be whistled at in return, and when Beorn plays our turn 78, TNT is only CoL down on us.
I wonder what MIA got from TNT. In fact I think we should ask them...
No matter what, it clearly shows MIA has been dealing very much behind our backs.
The other scenarios is that (a) our proposal, funnily enough, were made the same turn TNT finished Philo, or (b) that TNT traded Philo from Nuts.
One is possible but very unlikely, the other is impossible due to game mechanics.
Maybe it's time for Tubby to do a CivAssist scan on the tech situation.