AIX VAS NIS authentication issues

Hello All-

    Here's my issue, we have AIX 5.3 running NIS.  We are moving our environment to VAS but we need both authentication methods while we complete the process.  When VAS and ypbind are running, AIX always uses NIS as its primary method if you using SSH and keys.  I also setup the /etc/security/user default stanza to use VAS as SYSTEM default only, it still uses NIS.  I also set the registry = VAS, NIS still wins.  If I remove the ypbind service, VAS works as it should.
   We can not be the only company that needs to use VAS as a primary login method and NIS as secondary on AIX.  We have Solaris and Redhat boxes and no issues at all.  Of course they use nsswitch.conf, which AIX does not.  I have an open ticket with IBM and Quest, no soltions yet.

Thanks.