excel formula for determining time difference is late or on time not calculating correctly

I have this excel sheet that I have been working with people on this website for the past couple months. I have made serious progress and there seems to be this glitch in the formula i am using. I am attaching an excel sheet withe formulas and the line from the excel sheet that isn't calculating correctly. The basics of this excel are this, I am taking two different times and dates and from that calculating the time difference between the two. Once I have done that I am determine based on a rule that if the time difference is over 12 hours then the item is late if its below 12 hours it is on time. This particular line I am having trouble with is under 12 hours yet it says its late. On top of that it is the only line in the entire excel sheet that has this issue. I have double check the formulas against other lines to make sure it matches and it does. The line with the issue is on the 4 tab of the excel the first page is a sample of what the formulas are doing.


thank you in advance for anyone who can help me.

yes sorry i didn't explain well the requested time and date is when something was submitted and the actual time and date is when it was actually completed. If the dates were the same but the actual time was earlier than the requested it is on time. even if the requested was submitted earlier than then the actual as long as it is less than 12 hour it is on time. only when the requested is earlier and the actual time is greater than 12 hours then it is late. For example the problem I have is the the requested date and actual date were the same. But the requested time was 8:00 PM but the actual time i was completed was 6 AM so that mean its on time because the the item was requested at but it was actually completed at 6 that same morning.