When going to the Session tab in Wildfire’'s admin console it can displays too many active sessions.
In fact it displays the count of authenticated AND unauthenticated sessions. Therefore, only authenticated session are displayed in the list since we only have information for authenticated session.
Page fragmentation si based on this count, so in the end you can click on pages that displays nothing.
Step to reproduce:
With Smack or anything else connect 100 clients without authenticating
Go to the sessions tab you will have 4 empty sessions pages