OK, I think I have figured this out. The my un-tagged network runs from 2 to 255, but the static IP assigned to the SOHO ended in 8. I needed to define the un-tagged network on the SOHO as running from 8 to 255. In that case, it remains accessible through the web interface. The Balance One forces it to use the right IP address, but for some reason shows it as disconnected in the client list. So be it. At least it now works and I don’t have to worry about connecting two networks unnecessarily.