Just a few days ago I was lamenting the fact that I wasn't able to update my "current low weight" for about 2 weeks even though I've been pretty good (under my calories almost every day and getting plenty of exercise). In the past few days, my weight has dropped just about 4 pounds and out of nowhere I'm suddenly under 180.
The moral of the story is to trust what you are doing food/ health wise and just keep at it no matter what. When you least expect it, the "whoosh" will happen and everything will be caught up.
I'm going to continue what I'm doing. Nothing for me is going to change and if I end up losing more weight, that would be fine. Right now I want to just focus on body fat percentage. I eat healthy (usually 1700-1800 calories) and get plenty of exercise so I'm not very concerned about being "underweight". For my height, that would be a weight in the 150s and that will never happen.
I'm not ruling out upping my goal weight if I add more muscle and my body fat percentage goes down. To me, health more important than the weight. For right now, however, I'd like to keep 180 as my "red line" zone. I'd love to maintain long term in the low to mid 170s.