NIS2011 Identity Safe Works Intermittently / Login Not Listed But Fills-in

I have been having problems using Identiy Safe logins.  Some logins do not seem to save the latest / correct login information or perhaps more likely are being compromised by a hidden but older version for a particular web page which are not listed in the Identity Safe web drop down list but DO sometimes appear in the Manage Logins list. 

 

Additionally, some logins seem to appear in neither list BUT DO autofill.

 

Attempting to change the logins by editing login data via the Manage Logins list is not reflected in the auto login data used.

 

Using NIS 2011 with Firefox 3.6.12 or IE 8.0.7600

 

Pulling my hair out with this one!

 

Cheers

 

Martyn