Site not using local domain controller

Hello,

I could use a little help with a slight problem.  I have 6 Server 2003 domain controllers and sites set up.  Five of the sites are using the local controller to process the logon requests.  I have one site that when a user logs on, it bounces to any other domain controller except for the local domain controller.  This is also the pdc and a gc.  I double checked all entries in DNS and all appear to be correct.

Any ideas of diagnostics, logs or other settings that I can check to get this resolved?

Thanks in advance for any input.