Time Management for Unit 76

I have now in my tenth week of second year and currently am in my fifth week working on unit 76.  Currently I have an idea of what I am doing and have made good progress with my block out within the time given, I have worked on the game play, flow and look of my level and almost have a block out completed.  I now need to get a peer review on my map and possibly adjust my map to make it better based upon my peer review.  About now I would say I am on track with my level and with the help of tuitions, peer reviews, etc. I think I will be able to produce a very good map.  Calculating the time spend in session and time that should have been spent out of session I have worked out that so far I should have spent a total of 96 hours on unit 76.  I am also working on another unit (unit 74) and have calculated that so far I should have spent a total of 61.5 hours on that unit, with the two units combined I should have spent a total of 157.5 hours among both units.