CarltonBrowne - You're right, and reading further into I just confused myself even more!
Our duty hours totals (the 55hr/week 2000/year etc.) include duty and flight duty, so for this purpose they all count. However, we do keep track of the difference between the duty and flight duty. For instance, if we report at base to be driven to another airport for our flight, our Flight duty still starts one hour before dep although our max duty period for the day is based on report time at base.
For the life of me I can't think of the reason for their being a difference. I'm sure I knew the reason at one point but it completely escapes me just now