I agree that waist measurements are a 'moody' thing.
Another thing to consider is that if you're doing a lot of ab work and/or back work your muscles in that area could be growing a little. If you haven't lost fat from that area you may measure larger.
No one way of measuring fitness/health is going to give you the whole picture. According to body fat I'm average, according to BMI I'm obese! According to what people say when they look at me, I'm attractive, maybe a little over weight but definitely not obese.
Go by your ability to perform and how you feel (at rest and during physical activity), those are the best indicators of health.
"I'm in the race but I've already won
And getting there can be half the fun
So don't stop me until I'm good and done
Don't you try to rain on my, Perfect Day"
| Pounds lost: 23.4