I remember at one time the enemies were accidentally spawning where they died, that had been fixed. I think what you might be experiencing is either mobs left over from another fleeing player that failed to "reset" when they tried to transition areas.
There are some measures in place to stop monsters from chasing players through zones, when they enter a transition they should return to their original positions and disengage. There are sometimes a few quirks with this, I'll take a second look into it.
Sorcerers are little bit dependent on their familiar in the beginning. Summons were originally removed to help balance the combat aspects of early game, once a third summon entered the ring it was pretty easy to just blast through everything effortlessly, whereas other classes would not have been able.
As for bolts, you should be able to get some from the first merchant 'Captain Meb', if not I'll be sure to add those in there. Arrows and Bolts will definitely be available in Doddin's Rotting Cabin if you head north through the creek in the beginning.