In order to assist you with your Overtime issue please clarify how you would like overtime handled?
Concerning the S2 Exceptions issue from the screenshots that you provided the Exceptions are being caused by shifts that were scheduled after they had already been worked by the employee.
To resolve this issue at the Schedule View which can be found by clicking Attendance -> Schedules change the shifts that are in gray text (uncommitted shifts) on April 25, 2016 through to April 27, 2016 to committed shifts (black text) by clicking a shift so that it is highlighted in blue. At this point Edit and Save the selected shift without making any changes.
To prevent the issue from occurring going forward make sure that you create schedules for future dates.
For more information please see the Exception Policies Section of the TimeTrex Administrator Guide:http://help.timetrex.com/TimeTrex_Admin ... n_Policies