Hmm the stuff in the old world comes from bugs in drawde's DB data, easy to fix, just time consuming. I think this is mostly what Drawde does now, work on finetuning the zones he spawned.
A few things seem to just be wierdness with skins. I have seen this with the wolves in kael, this may be a emu bug, but more likely something to do with the DB.
The Kael spawns in ToV... err well that bug is all mine :( I was wondering were ariak's kael spawns had gotten to. I must have the zone name wrong in eqspawns.txt and changed it to ToV with all the spawns (Drawde I could never get the actual updated EQNPC program)
The DB is a continual bug fix/work in progress

Your usage is really helpfull in finding/fixing these bugs.