Your pressure is certainly too high - make sure the filling loop is closed, put a tray beneath a convenient radiator valve, turn the valve off, unscrew it from the radiator, catching any water, and take out as much water as you need. Go below 1 bar, then refill as required. Messy I know, but quicker than pulling water from the bleed valves - which will have the same effect.
John
December 2007