Reanimation - is it worth it for non-Ermor nation?

[Ballbarian]

Reanimating with a lvl 1 priest is yielding 4 ghouls.
Reanimating souless in a province with corpses yields 24 armored souless.

Strangely the manual shows lvl 3 priest as summoning 20 souless. A lvl 1 priest is supposed to get 4 ghouls and a level 2 priest is supposed to get 5 ghouls. Is there another mechanic involved in determining results that are not listed in the manual? These results were in enemy growth 2 dominion and I saw no change in population where raising ghouls. Assuming that the growth offset the population killed.