Why do some BSSIDs show as "not associated" (note: not all of them show as such; some just show a usual BSSID). I have tried to use the other BSSID that shows up for the other station but it didn't work.
The second part of the listing is listing stations, a.k.a clients - computers and mobile phones that your chip captured either communicating with access points, or sending discovery beacons.
Your screenshot lists 4 clients, 4 of which are associated with ("connected to")
XX:AC:D2:41:22:AC, which is the single access point you've been able to discover, while the last client (
10:08:C1:2B:7E:XX) is not connected to anything at the moment - it either doesn't know the password for the access point, doesn't have enough signal to be able to connect to it or didn't connect to it for any other reason.
The last column, "probe", provides a hint as to why you were able to detect this station - while it isn't actively communicating with any AP, it was sending discovery beacons for a network called
hXXXX, and your chip was able to capture that beacon.