That, good sir, would most likely be a pain elemental spawning additional lost souls. They add to your enemy count, thereby increasing the total number of enemies. As far as not finding all of them, SOMETIMES the baddies kept in a sealed room for "surprise teleports" will not empty out entirely, and remain trapped in the sealed room. hope this helped!
Baberaham_Lincoln
joined
26 year old longtime gamer. Mostly here for Doom wads/mods. Die-hard Brutal Doom fan. I'll play the hell outta that game till carpel tunnel takes me.