Matt at KSpeed.
AP should be fine. Nothing really wrong with the Cobb maps as long as you have the mods to support them. Stage 1 is not much of a boost if that is what you are running.
Lower gears have lower targets. You should really only see max boost in 3rd and 4th gears.
Do you have the mods to support Stage 2?
If you are having trouble reaching boost targets, there's a mapp for that.