Same issue here.  Add a new customer and project, then go to assign employee's time to the project and it is nowhere to be found in the timesheet entry.  Go back and check the customer file and they are there and active, back to timesheet entry nothing.  Reboot computer, nothing.  This happens often.  Sometimes they just appear after an hour or so.  Have tried it on-line and in the desktop app.  Same in both.