Mob placements differed from server to server?

[dusk883]

I didn't want to ask this silly question but I keep wondering about the answer.

How did this server decide where to put mobs that might be different than back in the day on live servers? I'm speaking specifically about Steamfont where the gears had 4 "always" skeletons at the gears and on P99 there's only 2 spots I can count on for my cleric to beat up on. Did the mobs slightly vary depending on server? On Tallon Zek for as long as I can remember, the skellies that I was so fond of back in the day just aren't there on P99 or were pvp servers different than pve servers?

Just curious is all how it all works ya know