What MBC did you get, Some are crap.
To see if you might have a boost leak or if the wastegate / MBC is bad do this.
Take the vacuum line from the boost source (your red arrows) to the wastegate. Run it. should only be 5-7psi. If it goes higher, then you have either a boost leak somewhere or the actuator is not opening.
So if that is good...you can assume that your MBC is bad or you don't have it set up correctly.
That is how it should look set up.
You need a gauge if you are going to raise the boost. They are cheap. You can get a manual sunpro one for 20-25 bucks.
The boost cut is located here. Unplug it.
I would not do that until you get your boost gauge & you know your boosting a steady 7-8 psi every time.
You can run about 9 psi without the rocketchip & up to 12 with it installed.