Even if we have a WLL that can receive a signal from 8 stations, it won't work either? Do you have any knowledge about it?
I thought if I buy a WLL and add extra temp or pull Solar and UV on the roof and connect to a Davis 6332 it will all work. I'm wrong?
Yes, it will work perfectly well if you are receiving data on a WLL (or, presumably, the new 6313 console). It's only the old, now legacy, consoles and Envoys for which the one-ISS rule applies.
Of course, you have to work out how you are going to display and log the data. If you have a Pro account at weatherlink.com then this will take care of logging the data for you (though you still need to nominate one ISS as the primary (or default) display for the wl.com bulletin. But, as far as I am aware (and someone please correct if this info is out of date), current local software cannot accommodate more than one full ISS, though I'm not sure about weewx. But this is a limitation of the third-party software and not eg WLL.