Don't feel too sorry for the devs over this. The game would still have been far from "great" without this typo - it just probably wouldn't have been received as one of the absolute worst games ever published.
A:CM was littered with flaws, of which the absolutely nonfunctional alien AI was just the most glaring. The fact that this simple but glaring bug was allowed to slip through the cracks and was shipped anyway should tell you something about the level of quality control that was exercised during development.
