Spring RTS Engine

I see someones played Alpha Centauri (the datalinks, but Einstein did actually say the Sticks and Stones bit)

the Advanced Moho Mine, the Ohio nuclear Missile sub.
The adv Moho mine doesnt show up for either Core or Arm. This is when running the client standalone.
the other few work fine in it.

I know it might seem somewhat noobish to ask after this but after messing around in Spring for most of the day Ive noticed that several extra units (added from OTA as .ufo) dont appear on the buildmenu. I was wondering if its something to do with unit conflicts or does TA Spring automatically reassi...