Very useful to know.
You're like a walking user guide
Bug: Alert ( Play Sound Alert / Show Message )
Yes, if triggering a rule on 'ANY' and you only want it to fire once on a selection then if placing bets you can use a 'number of place bets trigger condition' on selection is equal to 0
For other things like alerts etc then you can set a signal on selection when it triggers, and also add a signal set condition to the rule to test
Signal is NOT set on a selection
So if you had a re-arm time of 1 sec with the above signal and say selections 3, 8, 14 all met the conditions at the same time it would trigger on row 3 first (as its the lowest row number) then 1 sec later row 8 as the signal being set now prevents it triggering on 3 again, then row 14 as both 3 an d 8 now have signals set etc..