It is logical that you are already a Jedi. I guess they started you as a non-force user for the story line- the Jedi Council didn't expect you to regain your link to the Force so fast, and for the effect of the big reveal. The first time I played, it was completely spoiler free. My first video game, in fact. I had no idea if my character was to become a Jedi or not. Made it fun, too.
But for later playthroughs, it's a good way to explore the game. It would be cool to be able to use a lightsaber on Taris. I do like the benefits from the ordinary classes, though. The feats from soldier, skill points from scout, those really do help out later in the game, I found.
From what I remember from xBox, the rak ghouls in the Under City, and the wandering Black Vulkars in the Lower City respawned once if you go back through those areas. And doing a completionist playthough on Taris, recovering every mine, using as few computer spikes as possible, going the more direct route to pick up bigger xp. I was level 9 before boarding the Ebon Hawk. Now on PC, with mods that add more content, K1 Restoration and some other mod that adds more goons to Davik's place, popping 10 is easy.