I just had the missing ladders bug show up in my game. I am assaulting Egypt's Memphis, and had two ladders and a tower. However, only the tower showed up. Add one more anecdotal story on this one.

Unmodded installation, playing Seleucids on Medium/Medium.

My army consists of:

Two archer units

Three units of Levy Pikemen

Greek Cavalry unit

Camel Archer unit

General.

I almost always prefer multiple ladders. Now I'm faced with either reloading, or trying to take a wall section with pike levy soldiers without being able to attack from two directions. Is there an "Execute the Engineering Teams" option?