How do I get all of my sequences to start at 0?

I used the Level Sequencer to move the Trigger Box around in a certain location in my game, and I have multiple of them. But when I click to edit another one of my sequencers, the previous one is set AFTER the sequence and is triggered too early. How do I fix this? I am running Unreal 4.27 (sorry if I worded my question a bit off).