The engine light can be turned on or off for various functions and as your car has been previously tuned I wouldn't assume anything is doing what it should be.
You're always going to run gate pressure unless you set everything below that and set the over boost to where the car won't run properly.
There is more to the boost control than those two tables as you're probably aware. You'll need to either compare a stock file or use the return to stock wizard. I just read your last comment, it's only another $300 isn't it?
Unless it's the opposite from hptuners I wouldn't be setting my wg duty cycle to 1, even to see what will happen, as it is 100%. If other boost settings have been played with then you might break a ringland or 6 cos there might be nothing stopping it from boosting to the moon. Just put stock values in there to start with.
Also those pictures you posted before will be in inches of mercury. 10psi = 20.36 in hg.
Crikey that's a bit of a novel