Biogenic Soup

I have just played the "Po Valley" build-in scenario where I experienced a very creative interpretation of my waypoints by the TacAI, while crossing a bridge, in a TCP game. I know that the AI is a bit erratic at times so for all of my squads I had a waypoint right at the start of the bridge and another waypoint at the far end of the bridge, which IMHO should instruct the AI to cross the bridge. For app half of my squads this was not the case though, instead the AI chose a path across a shallow ford 300m to the east of the bridge and back to the waypoint at the far side of the bridge (a very long detour of 625m instead of 25m). I can think of three possible reasons for this behavior: 1. The number of troops that can cross a bridge in one turn is limited to a given number. (I was trying to get a company to cross in a 1-2 turns) if so does anyone know the number of units that can cross a bridge at the same time? 2. The scenario is bugged: Something prevents the AI from seeing the bridge when calculating the path of the infantry units. 3. This is a bug in the TacAI. It should be noted that I experienced no problems with vehicles despite crossing the bridge with seven Shermans I one turn. The infantry units also had different types of move orders (move/advance/fast) and all where affected. If anyone know which of the 3 reasons above (or a fourth reason) I would be grateful as it is quite important to be able to plan accordingly if I encounter a scenario with two river crossings again.