Is there a duplicate channel that is showing the EPG?
Whilst watching BT2 press your arrow down button to open the channel selection epg then press the red button for all channels.
If there is a duplicate it will be next to the current BT channel your watching.
Ive had similar problems with sky1 and ukgold in the past.
It is Thursday, this means changes on Astra. The first thing that happens when a channel changes is that the EPG data no longer works, then the channel will go.
Stop enigma2 from running using "init 4" command
Wait 10 seconds to finish shutting down
Delete epg.dat
Delete the crossepg folder
Restart receiver with "init 3" command
Setup CrossEPG and run again.