Setting up base camp 10 lbs too soon!

I have stayed the same weight for months. It's a statement, it's a fact, and unfortunately, it's a complaint. How demotivating! I'm beyond frustrated. True, it's just a number and only one way to measure progress, but I measure my waist, hips, thighs, bust, neck and arms too. I even measure my body fat (which I know is not as accurate). I know I'm tall, I know I've had two kids, but it's NOT FAIR. I run over 20 miles per week! I swim, I cycle, I lift weights. NOTHING. NO LOSS. NADA. I guess my body is happy here and it is a healthy BMI, so I SHOULD be happy, right?!? Only I'm not. I know it's just as important to maintain weightloss as it is to lose weigh, and I'm happy I've maintained my 50 lb weight loss. HOWEVER, I've logged my weight since 2008 and this is WHY I'm frustrated:

At the beginning of 2008, I lost 20 lbs and my "normal" weight was around 150. Then, I started a new job (first jump up), then I had my second baby (second jump up is 6 months postpartum). Now, for a year I have "zig-zagged" within the 170-165 range. WHICH IS FINE... but why can't my range be back in the 150-155s?

I'm sorry if this seems too critical of myself, or too superficial. It's just that I'm extremely frustrated and I need to fix either my attitude or something in my lifestyle. Just imagine how you would feel if you climbed mount everest and hung out 200 feet below the top of the mountain for a year.... just waiting.... chillin'.... thinking about reaching the top but not moving... It's EXHAUSTING! To be so close to something and never reaching it has been a year-long torture & tease.

I needed to vent.