I would hope that when the local API gets released that the output is Station Pressure and not Altimeter. Then your weather software of choice can do with it what you want. If not and you want MSLP in your software then you will need to zero out elevation....which will then screw up weatherlink.com because it will then be getting Station Pressure also. Oh what a mess it will be if the API output isn't Station Pressure. Its going to be a mess if this happens even if you prefer Altimeter...because 3rd party software needs Station Pressure. Remember the mess before Loop2?
So perhaps weatherlink.com is an Altimeter displaying web service like CWOP, and the baro specifications just mean that the app display is also Altimeter.
Really silly if it can't do both like the Vue console.