@Maria259
I expect that you will find that there is a duplicate BBC1 HD somewhere in the high numbers (800+) with the EPG displayed.
You need to delete both versions (101 and the 800+) and then do a manual tune of the BBC-B Mux to get things back in step.
You will lose any programming you have for any HD channels, so take photos of your Schedule first as you will have to reinstate parts of it.
If you are able to say which transmitter you are using, we can let you know which UHF Channel you will need for the manual retune.