Are you using learned signals for the TV?

If so, do you know how to view the Pronto Hex for a learned signal in ProntoEdit?

Once you figure that out, post the Pronto Hex for '1' and for '0'. Maybe there is something flawed in the '0' signal to make it fail when used in a sequence.

What you've done sounds correct, so I can't make any suggestion that I would have any confidence in. But, you might fix the problem and or learn something about it by trying some changes and see how the TV responds.

I would try putting the command to turn the TV to analogue TV before the command to turn the amp to tv input. That ought to allow you to skip doing that .20s delay before the '1'.

Also, try the same sequence with different numbers, such as 1, 2 or 0, 9. I know you want 10, but it may help to know whether the problem is specific to 10 or to the '0' digit or to the second digit or what.