the oil pressure comes in pulses and they are always pulses of the same pressure (it's determined by geometry in the pump), it's just as flow increases the mean oil pressure (average over time) increases - because the oil pressure signal is heavily damped this gives the impression that oil pressure remains at some level.
Anyway - StuC -> get the oil pressure checked by a mechanic it's the only way to know for sure. You could drop the oil out of it and check the pick-up as well - also just try cornering hard, see if it makes any nasty noises