I am reasonably proficient in using Windows, but very new to networking.

I own a Verizon FiOS router CR1000a, Firmware 3.6.0.2_BD.  Call its SSID  “OldNetwork”. I connected one XE75 to it with an Ethernet cable, and created a network, call it “NewNetwork”. I connected 2 desktops with cables directly into the Deco ports. I had the wi-fi on the 2 desktops turned off Windows, so they only got the hardwired connection.

At that time, both my desktops and my laptops could see and connect with Oldnetwork and NewNetwork. In either case, all could find each other. They could also see the SSIDs of my neighbors.

I then used the app to make the XE75 an Access Point. I did NOT turn off the wi-fi on the CR1000a (Note that the desktops already had their wi-fi turned off).

When I did that, the ethernet-connected desktops could only see, and connect to, the OldNetwork. They could NOT see either my NewNetwork, nor my neighbors

The laptop on wi-fi-linked laptop could see and connect to both the OldNetwork and the NewNetwork, just as before.

Is this supposed to happen? Why does the NewNetwork disappear when the XE75 is made an Access Point?

I could not find any postings of similar events online.

If this is okay, I will have to connect all computers to the OldNetwork, in order for the laptops and desktops to see one another. If I do that, what do I do with the XENetwork?

TIA.