How to format times between 12:00 am to 12:59 am (Updated)

The attached file is a sample of a timesheet I’m working on. If I enter military time in cell between E4 to N4 and from E9 to N9, it is automatically converted to hh:mm format. For instance 1300 becomes 1:00 PM.

However, when I enter a time between 12:00 AM to 12:59 AM in a cell, the value inside the cell changes from "hh:mm:ss AM" to "1/1/1900 hh:mm:ss AM".

For instance 2400 become "1/1/1900 12:00:00 AM" instead of 12:00:00AM inside the cell. Because of this change, I get a ########## error instead of the number of hours between two times as shown in cells G10 and M10.

Is there a way to get around this problem? Thanks in advance for any suggestions.