Couple of questions..

[aj2000]

Assuming they're not units with no moral, I'm guessing its the infamous droid bug.

There's apparently a bug involving army slots occupied by repair droids (or guard droids?) that locks out moral changes in said slot forever, even after you remove the droid and reload save in most cases. I think restarting a new game will fix it until you use droids again. I read this from somewhere and apparently a couple players have ran into it already. I've not experienced this as I do not use droids.

Its a damn shame as I really want to use rep droid / guard droid + sacrifice combo to grow my troops, but I stayed away from droid since I read up on the bug...