Can't change P51D's supercharger + Hat switch viewing issue

[Joao611]

Game is updated, 4.12.2m, gotten from Steam some days ago.

In the P51D, no matter how much I press Shift+H (assigned key to Supercharger's Next Stage) and Ctrl+H (Supercharger's Previous Stage) and how high I go (even tried spawning at 10Km ALT), it simply will not change from whatever it's set to (no changes in the switches, pressure, etc.).

Also, having already switched from snap to pan view, it seems there are always predefined spots to where my view goes if I press my hat switch. For example, my view is centered on the gunsight, I press my hat switch once to look down and it focuses on the instruments. Do it again, it focuses on my seat. Always these exact same spots without smaller adjustments.
This is VERY annoying (for tracking enemies, looking at instruments away from the center of the views, etc.) and I'd like for it to be a smooth movement, just like on games such as IL2 BoS and DCS.
My mouse works wonderfully for the viewing, but I can't really use it at the same time I use my HOTAS X.

(yes, I know, I have to get around to build headtracking and get a decent camera... eventually.................)