Problems seem to only occur during re-syncing between the host server and the fail-over server. Three symptoms.
1. Time out and disconnects
2. Apparent loss of admin passwords and the account acts totally locked out
3. Popup windows (e.g. virus quarantine) allowing you to see the txt or header kicks back with a login screen. Most of the time this is fixed by doing a refresh on the spool management page.
I don't have any idea why this is such a problem and would love to know if anyone else can replicate the problem. After adding secondary Admins have not had any trouble since.