Can a stock fuel pump produce too much pressure?

I have a weird high pressure issue with my Duster, it will go to 9 psi with a Carder muscle car series pump, specs show it at like 5 psi for the pump.
But it does not seem to affect the carb.
I am thinking the gauge maybe got some residual 93 ethanol gas, that gummed up the gauge readings.
But the gauge will go back to zero. Maybe the gauge is right????? and the carb 625 street demon is tolerant of it.

The high pressure readings did not start until the car sat over the winter with ethanol gas in it.