ahhh, well here is your problem then! Screens help so much!
So, you don't need that first page. That is what is causing you to have to hit enter twice. The first time it turns self switch A on, and the second one only works when you press enter again. so to fix this, you need to do two things.
First, delete that first event page, it's totally unnecessary.
Then, on the second page, just un-click the self switch condition and you should be set to go!
Hope this helps!
~xgamexfreakx