So first off, I have played New Vegas extensively, and I was forced to start a new game this time because my previous new character, who had just left Goodsprings and reached Nipton (After beating Primms miniquest), Fast Travelled to the Mojave Outpost, and when I did, the NCR trooper suddenly whipped her gun out, alarmed I look to see why, and two jackals spawned in the Brahmin pens. Then a few more spawned inside Nipton, what the hell happened? I dont understand what went wrong with the game. :confused:

Did these Jackals follow you into the Outpost on a previous visit?
Fallen enemys tend to respawn where they died, just like in Fallout 3.

I recall one post about a raider being killed in Megaton which had followed the player through the main gate.
Needless to say this raider respawned inside Megaton where they had been killed.

No, thats the bizarre thing, they spawned when I came out of the bar at the outpost, the only Jackals I had killed were at the Highway Police Station, and the ruins of the Nipton Rest Stop thingy midway between that old gas station and Nipton.