Strange TAF processing

Hi Damian,That's not the 1st time it happens what I'm going to report to you now. But today I decided to take some screenshots and submit them to you. I had VFR condition for SBBR area, made a VFR f/p, prepared the flight on VATSIM, and took off with almost clear skies and the METAR SBBR 031700Z 14013KT 9999 FEW040 25/08 Q1022. But after 2 or 3 minutes I almost suddenly got a terrible fog and low visibility situation, as you can see. Now, ActiveSky shows "Clouds Lower Ceil 2981" and "Clouds Lower Base 1823". That's very very strange, not only because of the FEW040 on METAR, but also for the fact that the terrain elevation for the whole area is about 3400 ft! Is there any explanation/solution for that, besides turning TAF processing off? Also, should say that I'm still experiencing a lot of beeps on FlightWatch messages, some of them not justifiable considering the simplicity of the corresponding METAR strings (some easy temperatures, winds calm, simple cloud layers, and QNH/Pascal improper exchange).Thanks in advance,Jalok