Have you got another boost gauge or just the ebc readout.
It seems your ebc pressure is reading incorrectly. If you are stationary and @ idle your turbo will not make boost and it should be reading vacuum.
I'm running 20psi with my std gen3 with no issues yet.
I ran 23psi with my gen2 with no issues other than the turbo running out of puff and dropping back to around 12psi @ 6,000rpm