It may be neither.
It could be that you are tuned to multiple terrestrial transmitters (one full freeview and the other lite) and the recorder has got confused as to which transmitter to look out for the True Entertainment channel.
Which model of box have you got?
And if it is a freeview/youview box which transmitter(s) do you think you are tuned to?
Unless you have a youview box then for a quick (but not best!) solution you could try recording it as a repeat recording instead of using the series option.