Lyle McDonald has all the physiology here. The carb-up as I mentioned is over 24-48 hours, and is intended to reset leptin and other appetite regulatory hormones. The maintenance period is intended to help you reset your metabolism and should be, as Derek mentions, at least 2 weeks, but you might need a longer time given the extended time you've done on reduced calories.
I would also do a hard look in the mirror (literally) and ask someone you trust to give an honest opinion to see if you really need to continue to drop fat. It is very easy to fool yourself. Just based on you starting and ending weights and %bf, you've pretty clearly sacrificed some lean mass to get to your current weight.