Annoying NetworkManager "feature"

[Gene Czarcinski <gene czarc net>]

I like a lot about how NetworkManager works.  I especially like the way it 
handles wireless connects.

However, there is a NetworkManager "feature" that is extremely annoying:  
creating new/additional device entries in its list of devices ... sometimes 
one or more additional entries with the same name and sometimes "Auto eth_" 
entries.

This has become especially annoying with a qemu-kvm guest where on of the NICs 
needs to have "Use this entry for network connections only on its network" 
checked ... new entries are created when NetworkManager starts which do not 
have the check.

If there a way to disable this feature? [new/additional entries]

Why are these new/additional entries being created?

Gene