Ah!!! I found it! "Connection Preference". I left it set to "Auto" because I don't tinker with automatic settings that the manufacturer thinks make sense, unless I have to. When I turned off "Auto" I...

Got a three-pack of Deco XE75 Pro to start upgrading my home network from a hodgepodge of old wireless and wired equipment. My house has three levels, two floors and a finished basement, and we need...