Set Altimeter bonding a320NX with Bravo

Hi all, i tried to bond the Set Altimeter action to one of my Bravo buttons (Button 45) and I am flying a320NX. When I push the button, the Altimeter sets to value 30.03 although on the MSFS controls, when I hover the mouse over the Set altimeter function, it says in the description: Sync altimeter setting to sea level pressure, or 29.92 if above 18000 feet.
I was flying 19500 feet.

If the Bravo button is bound to the MSFS command “Set Altimeter”, pressing the knob the second time should have changed the display to the correct reading at that altitude, which is 29.92.
That will occur in the FBW version, but it won’t stop the display from flashing. That needs to be set to STD, by pulling the baro button towards you ( you need to click the bottom of the button).

I found that Mobiflight was the best route to take with regard remapping the buttons on the bravo throttle. I have changed most of the buttons to push / pull for the A320 glareshield functions.

This was the post I mentioned previously.