Check for errors and correct them based on specific logic

Hello everyone
In my attachment I explained the logic of correcting errors in sheets("Result") ..
I need the desired results as in column C in Result sheet
the logic may appear weird but it would be clear ..
The idea of the file is to record presence and departure of emplyees ..some employees recorded twice so eveything would be ok as one time would be for presence time and the other for departure time.
As for employees recorded once (see if presence time ,so the presence time should be recorded only .. and if the departure time recorded so the departure time should be recorded only)
As for employees that don't exist in data would be empty in results
As for employees recoreded three times or more should search for the first time for presence time and for the last time for departure

Thanks advanced for help