[Atraikius]

One thing that was messing me up until recently was the lines:

Num Must Have At Least 1 Ability := 1
Must Have Ability 1 := Weapon

From what I could tell, when the AI designs the ship, it will place the "Num Must Have" of the primary weapon after the minimum amount of engines, then will go back and add additional engines followed by the tonnage of weapons desired.

This way, if trying to have the AI design a frigate (200) with one CSM, and 2 DUC's, with the "Must Have" set at 1, and CSM at 1 for every 200, and DUC's at one for every 100, I kept ending up with a ship with 2 CSM. When I changed the "Must Have" value to 0, then it was designed with 1 CSM, and 2 DUC's.