I have the same problem. My first Netatmo station works for Windy for years and everything id OK. I just installed another one in 17 km from the first, added this station to my Windy account, and the second station reports the same results as my first one. But in real the parameters are different - I see it in Netatmo app.
Is there any solution? I looked at API page - commands are mainly the same, only WindyIDs, names and lon/lat coordinates differ...
My Windy stations' IDs are f0666b11 and 1f0666b11.
Or should I create another account for additional station?