Wind randomly changing

[fsxwx]

it randomly happens, even when theres no new weather injection

Then, I highly doubt that it 'directly' has something to do with FSXWX, but rather an incompatibility with another addon.
Maybe, do have also ASN (or any other weather engine) installed? ASN uses a DLL which blocks other addons to hook up with certain variables and that could prevent FSXWX to control the winds directly.

Oh and something else, sometimes the aerosoft airbus really doesnt like fsxwx. On takeoff for some reason i went to 400 knots and my fuel went to max for no reason.

It seems that there is something seriously wrong with your FSX installation.
The Aerosoft Airbus works fine with FSXWX.