Are your break times only added back to your available time at the end of the week, or do they become available the next tour of duty? I figured that they were included in your 14 hour duty time because you were at work and it does use up your available body resources. I think it is odd, though, that it counts towards the 14 but not the 60.
I think it updates sometime overnight... I can tell you that come Friday, my 5th day, the hours are showing available and for the life of me at first I couldn't figure out where they were coming then I figured it out. And I agree, odd that it counts towards your consecutive 14 hours on duty buy not your 60??