i think ur stage 2 cams are supposed to have a littl ebit of a lope, you might be able to tune it out but I dunno.
The exhaust will cause a slight lope if it's too big or non existent (like my hatch). I'm just assuming you don't have a cat or high flow one, if it's true go back to the original and it should smooth everything out, otherwise wait for other responses, I personally wouldn't advance timing for those mods.