When logging into the help desk ensure that you are using a ticket
view that includes the condition the ticket was submitted under and that
the user you logged in has access to the department that the ticket
belongs to.
Login as the absolute admin
Go to Open Tickets -> Add & Manage Views
Edit the View You are Using
Check that the conditions that you have set correspond to the ticket you are not seeing.
If you still are unable to account for tickets that you can not view go to
Administration -> Users
See what User Group your User belongs to
Then click on the Admin Groups tab and edit this User Group
Ensure that your User Group has permissions set to access the ticket that you are not able to view in the help desk
If
you are still unable to view your ticket then click on the ticket view
tab on the upper left and then check to see if the ticket was filtered
into the spam box.