So I recently made my way into ch3, and decided to go with the strategy I had been using for the previous chapters, namely, keep some units in every territory while slowing advancing forward.

The enemy ai decided to do what it liked to do, which is to say, send 50million troops to about 8 different territories of mine in the same turn.

And here's where it got weird. I was only allowed to use the RTS mode for one of these battles. Every other battle forced me to use an auto-resolve (either commander or just the army). Needless to say I lost pretty much all of them (given that I start with armors and zepplins and the enemy starts with juggernaughts and bomber balloons...)

Is it intended that you're only allowed to use the RTS engagement once per turn, or did I just encounter a strange bug?