about a month ago i got my 98 wrx tuned. it was done by jason at southern motor works, and from what ive heard and read they do a pretty good job over there.

anyways, my issue is, i got my car tuned to run on two boost settings as it has a 2 stage boost controller. one at 11 psi and one at 14.5 psi. this has been all good up until now, when running the car on 11psi it runs fine and i am actually peaking at around 11 psi, but when i switch it over to 14.5 im only hitting around 8 psi max. it wasnt like this previously and ive only noticed this in probably the last week. what would cause this? is this an issue i should be worried about? or has my boost controller just shat it self?