Calculating Hours Worked With Overtime Clause

I need to worked out Hours worked in a timesheet. This was the easy part, the hard part is the clause tha HR threw in, which is:

If you have worked and 8 hour day WITH 1 hr lunch then you qualify for overtime.
if you work a 8 hr day and work through your lunch (1 hour) (so equivelant to 9 hrs) you still do NOT qualify for overtime there for Overtime = 0.

This is cause some people work though their lunch to get overtime, but legally they have to have a break so we are not paying overtime for it. I have basically tried in a formula to replicate this but it works with some data and not with all.
attached is an example, as you'll see the formula works in some cells, but not others.