Oil pressure warning, but got pressure?

[SweSupra]

Hello!

Iv got this problem, it doesn't feel good driving with it.

So after a minute or so after starting the engine cold, the oil lamp shows up
and stays on untill i kill the engine.

However the oil pressure is good, if i can trust the original pressure gauge?

Shouldn't those two work together or is it two separate systems?

And there is one thing too! Im not 100% sure that i got the right oil stick, i fear its to short, cuz there is on that is shorter right?
Im sure i filled the right amount of oil at last change and it just showed up on the bottom of the stick

/ SweSupra