I think you can drag each item up or down? It's not the most intuitive process, and not at all safe to do while driving.One thing I’ve always hated about AM… you’re on a route and realize you need to go somewhere after your set destination and want to know how long it’ll add to whole route… add stop only allows something to be added before your currently input stop, not after. So you have to cancel current route, recreate it, and add the other stops you want. Wish they allowed rearranging stops while in middle of a current route.
What I really wish for is a "pause route" button. Sometimes you just want to stop really quick for food or gas or something, and Maps will just go insane trying to get you back onto the route.