Maybe box might need a factory reset so channels might work correctly,reading the kv guide.
credit to eileen for below fix
1. factory default MENU-INSTALLATION-0000-FACTORY DEFAULT SETTING-OK
2. delete all channels MENU-USER PREFERENCE-0000-DELETE ALL CHANNELS-OK
3. delete all sat/tps MENU-USER PREFERENCE-0000-SAT./T.P.EDIT-OK-NTL (your provider)- (scroll right, then left to delete)
4. factory default
5, edit sat/tps, go to who your provider is, change qam to 256 MENU-USER PREFERENCE-0000-SAT./T.P.EDIT-OK-NTL (your provider)-scroll right-OK-schroll to Qam and set to 256 on each
6. go to installation, select your provider MENU-INSTALLATION-0000-AUTOMATIC SEARCH-NTL (your provider)-ensure network scan selected)
7 start search, by pressing green button
8. when your area appears, scroll up and select it,press OK
9. after its finished, exit, turn off via remote,
10. hopefully happy days,