On Toggle Event Enabled means, it will allow/disallow the events for the effected brick, but only 2 at a time.
Like, say Event 1 is On Player Touch Player Kill and it's unchecked
And Event 2 is On Player Touch Set Player Health 100 and it's checked,
Make Toggle Event Enabled 1 2, so when you activate it either 1 or 2 will be in effect, neither can act at the same time. If you need more help I can use screenshots.