Maybe depending on the format.
Check your Data Filters of the HUD (s) you are using.
In your case there must be a filter based on the number of players:
if the problem persists after this check,
Try this:
Close Xeester
Make a copy on your desktop of the folder
C:\Program Files (x86)\Xeester\mysql\data\xeester_v2
(if there is a problem later, you can copy paste this folder from your desktop to C:\Program Files (x86)\Xeester\mysql\data )
Start Xeester
Repair the database in Xeester (Start > Repair the database)