Vatsim weather

[Mr.Enska]

Hi, I have done my first vatsim flight on FSX and I was using FSXWX 1.6.3 as my weather engine. I realized that the weather I get with FSXWX was different than what was stated in the vatsim METAR report. Should this be happening or is it normal? This isn't a huge problem but it isn't realistic as vatsim landing runways are based on the wind and if the wind is different in the sim, there is no point in having a weather engine. I don't know if FSXWX is to be used for vatsim but I really hope the weather was same as in vatsim.