Forcing a BSSID, unchecking "Connect automatically" doesn't work

[Chuck Anderson <cra WPI EDU>]

I'm trying to force a specific BSSID (testing 802.11n in fact) but 
NetworkManager keeps trying to associate to the other BSSID's (APs) on 
the same ESSID.  In fact, it popped up with a dialog to set up the 
encryption settings, etc. (WPA TLS) because it couldn't use the 
connection profile that I forced the BSSID on.  So I let it create 
another Auto profile, set up the encryption, and then unchecked the 
"Connect automatically"...but guess what?  It still connects 
automatically.

How do I force NetworkManager to ignore all BSSID's for a specific 
ESSID, except for the one I want?