When a driver is checked in to the Driver App the driver will be displayed on the dispatch board in the Operations App and in X Tracking. The ability for a driver to check in/out from the Driver App is controlled by a permission in the driver record.
If a driver logs out of the Driver App but remains checked in, the driver will still be displayed in the Operations App and X Tracking.
Go to Maintenance > Driver.
Select the driver you would like to edit the permission for.
Check to enable, or uncheck to disable, Allow remote check in and/or Allow remote check out in the Nextstop tab.