I'm not a conspiracy theorist but I remember the machine failed in 1996 and it put the draw back an hour, that was back in the Bob Monkhouse era...
Yes, because John Willain forgot to close the door properly, the silly sod. There were a few occasions when the old Thunderball machine broke and failed to choose the Thunderball so they had to have another go.
The thing about fixing it is that the aftermath if someone found out they were doing it would be enormous. It's ages ago now but when they did The Big Ticket, that crappy scratchcard-related game nobody liked, they had a special lottery for people who bought the cards and in the first week there was some sort of cock-up, I think the wrong ball was identified, and even though this wasn't obvious on screen and nobody watching would have noticed, Camelot still announced there was a mistake, put ads in all the papers and said that you'd win if you matched either the ball they'd incorrectly read out or the one it actually was, which cost them loads more money. When they could have completely covered it all up. So after going to all those lengths when nobody noticed, why fix it? They'd have to pay out loads of compensation, Camelot would lose their licence and nobody would play it again.
Same as when people used to say the midweek one was always pre-recorded and they were lying when they said it was live, yet they always specifically said on air when, for whatever reason, a draw was recorded earlier.
As for the duration of the show, if that was ever the case it certainly isn't any more, a show needs to be five minutes long to count in the ratings.