Thanks for the response, Cookie. I'm having issues with your suggestion.
My teleport trigger is called "Trig1" and the checkpoint trigger that is supposed to activate Trig1 is called Trig2. I put "triggerActivated Trig2" in the condition box for Trig1. My thought was that, once I activate Trig2, Trig1 would activate and would be available to use. However, once I activate Trig2, I instantly warp to the teleport destination above the enemy base.
I just want Trig2 to allow Trig1 to be used. I hope that makes sense. Any thoughts?