Red,
I am not sure...
If the pool is scheduled to run for 24 hours, then when you go into the spa mode, it should switch back to the pool mode after 2 hours due to the egg timer.
If the pool circuit is not on at all, and you turn on the spa, then the spa should shut off after 2 hours and then nothing will be on.
In your scenario, the pool is on when the spa is manually turned on, and then the pool shuts off before the 2 hour egg timer shuts off the spa, I would have 'assumed' that the spa would have shut off after 2 hours..
I assume that you are manually turning on the spa, and that the spa is never 'scheduled' to be on.. Is that correct?
I do know that if you manually turn on a Circuit that is
also scheduled, that depending on when you do it, it can confuse the system and it will run until the next scheduled event.
Thanks,
Jim R.