Vantage Pro2 multiple stations and weather services

[brianeh]

I am considering a second ISS for the far end of my property (elevation change, exposure, and distance).

I would like to send data from both stations to weather underground, but it appears that I might not be able (or does it happen automatically).

I also can't seem to find guidance about setting up my stations properly. For example one ISS would be "station 3" on the Vantage and the other would be "station 4" (or 1 and 2).
Right now, I have my Vantage on "Station 3" to avoid interference, however in the meteohub I still have it on sensor group "0". And if I attempt to set this to "2" (where I would expect station 3 to be) all goes sideways.

Thanks for any assistance!