Well LSU and Alabama (replay) is currently being broadcast on BT ESPN so I guess their schedules have not been updated to reflect a changed start time.
As I was watching ESPN earlier I realised that everything seemed to be running half an hour late. I can understand, though, the OP's irritation as the EPG wasn't updated
Of the channels I watch (quite a lot of sport) it is my impression that the BT Sports channels are the ones with the most short notice changes and non alteration of the EPG to reflect this
It is a good game!