simultaneous movement in events

Good evening. Hopefully a quick question, how do I make actor and/or npcs move simultaneously during events? Like say Shadow and Interceptor. The instance that comes to mind is the Fiagro castle scene while they're all riding chocobos.

I'm trying to make it so Shadow and Interceptor enter the scene at the same time. Shadow is a character and Interceptor obviously a NPC. When I do one queue after the other it looks like one then the other moves. So I tried animating out each movement seperatly and sequentially, and it looks choppy and awful. The basic structure i'm using for the action queues i'm using is 01 82 8A FF, if need be I can post up the whole event but I have a feeling it's something small I'm missing. Thanks in advance for any help.