Night shift , Half day leave calculation

Hi Experts..!!

I need one help.

Actually , Employee is working in night shift from 22:30 to 06:30  on , 13:04:2014 .

Previous day indicator is checked in R/3 .

This is the work schedule of an employee:

Now employee is willing to take half day leave :

So i am giving from date 13:04:2014 and to date 13:04:2014.

Time from 22:30 to 02:30 . But it is not getting the correct  hours  , It is taking full hours.

which is not correct.

Please help me how to resolve this issue.

Its Urgent , please help.

Thanks & Regards:

Gaurav Singh