Well.....it seems that my choices for it to work right are.......
None, on the security choices, allowing me full access with 2 wireless print servers, and 3 wireless DWA-142s allowing for full 300Mbps.
or
WPA, that allows ll to work, but at only 54Mbps.
Since I live in the country, I don't have to worry that much about encryption, so None it is, and everything works great all the time.
I have played around with the WPA2 feature long enough. There is a Windows Update file for the DWA-142, but it didn't help. If your log is full of Deauthentication lines, there is a problem with the WPA2 software on one end or the other.