Because transmitter problems make programmes play in fast forward
I thought he maybe meant "transmission problems" and it just came out wrong in the rush, but then goes on to say how they "might be in your area" and "nothing wrong with what's coming out of the studio". Haha clearly thinking on his feet and just confuses matters a bit. Also, seems to me that he takes it quite personally that the whole 'magic of television' has been revealed.
I liked Philip as a presenter in his younger years, but was rather surprised at how quickly he became a little passive-aggressive in this cock-up! Plenty of little barbed references throughout the rest of the show.
Also, the early reference to taking "three calls", did they screen the answers and then knowingly put two incorrect callers on first, or was the assumption that a lot of callers were a bit dim so there would be time for three? I didn't realise it would be fairly normal for the show to finish without anyone winning.