This question kinda goes along with what i said earlier ... but if i want to have an event happen only after another event... but ive alredy have a switch for the event... would i create a new page or use the other switch slot.
A 3 page event then? If switch 2 is completely dependant on switch 1, you only need to use one precondition slot. You CAN use both slots though - it won't affect anything.
And yeah, switches can affect the entire game, not just the map where you set it..