Seems I may have found a bit of a 'bug' in the User Manager.
I have 66 Users on one of my sites. When I access the User Manager, and I leave the "Limit Results" field set to the default of '50', GeekLog duplicates the last four users that were displayed on the first 'page' of users, on the second 'page'. It also leaves out (does not display) four of the users that should be listed.
If I set the "Limit Results" field to 100 (so that it doesn't show the users over two 'pages'), it displays all of the users correctly.
The code in the version of user.php that I'm running doesn't match what you showed me. For some reason, the version of user.php that I'm running is 1.73, not 1.82 or 1.83. I installed Geeklog 1.3.9sr1. Am I 'behind' in some updates?