Hi,
Yes, Tania is correct. For first issue keep blank in field "Non-working period".
For Hours= 0 in absence infotype. As Non working period we generally never assign any break as planned working hours are 0 so break is not required.
Assuming your requirement as to calculate this time gap for Non working period, you can write PCRs and calculate it and store it in TimeType/Time Wage Type.
Regards,
Ketul
