A.I. Reinforcements?

[Flyboy]

Has anyone else noticed that AI reinforcement for Editor-generated scenarios tend to sit still on their entry hex?

I often set up a battle where as P1, I'm assaulting AI/P2. To keep the situation fluid, I like to set up AI reinforcements.

I noticed that if I bought and deployed the AI forces with the game selector set to "P1 Assault P2", the reinforcements would pop up in defence posture, and wouldn't advance to the front line.

So I tried buying/deploying all the main/fixed/dug-in AI units, then re-setting the selector to "P1 meeting engagement P2", buying the AI reinforcements, and deploying them as such. Then resetting the selector to P1 Assault P2 before saving. Didn't seem to make a difference.

Is that just an unavoidable limitation of the P1 Assault P2 game?