Here's a theory - the correct numbers were projected onto a clear screen placed in front of the balls. - or perhaps the balls themselves are mini screens which are operated by a type of voice recognition programme which would activate when he "shouted" the numbers out. The simple solution, of course, is that he had an accomplice place the balls while he was getting all excited and writing the numbers down to distract the audience.
Just as a matter of interest, the first three numbers drawn - 23, 11, 35 - when placed in numerical order - 11, 23, 35 - show an increment of 12. Also, look at number 39, if you add 12 to that you get 51 but because the upper end of the draw is 49 you start again at number 1, 2 etc. Is it a coincidence that number 2 was also drawn ?
As you can see, the main numbers drawn were - 02, 11, 23, 28, 35, 39 - so I can't see where number 28 fits in !!! so bang goes another theory.........
Okay, Okay, back to the drawing board.