Im working on my puzzle entry and I ran into a problem with multisources that would have ruined my puzzle but I found a solution. I had a few trigger_multiples set up so that when you walked through all of them they triggered a multisource that triggered something. When I would walk through all of the trigger_multiples the multisource would be triggered. After this I would do it again and it wouldn't be triggered until I would do it again. What I did to fix this was get rid of the trigger_multiples and make doors that when walked on would trigger the multisource and I made them invisible. After all doors are stepped on they trigger the multi source "every" time... Hopefully this will help someone