This is probably one of the most irritating issues I've encountered with the pack. When you send down flower pals down the aisle, after they do their cute animation of walking down/throwing petals around, they will then switch to a sitting state and actually go to sit with the other guests.
But when you send down any of the Wedding Couple sims, they will do the animation and then begin going off as they please. I hate this as this is one of the most magical parts of the pack and it sucks that the Bride and Groom don't stand at the actual wedding arch. It breaks immersion so much!
