my personal bugg fail

I bought a bodybugg in March, so excited about what it will do for my weight loss efforts.  So, here we are nine months later.  How am I doing?  Not good.
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See, my body defies science.  Everyone says Calories In vs. Calories Out.  Well that equation just doesn’t cut it.  I burn about 2800 calories/day so you’d think that I’d be able to eat 1800 calories a day and lose 2 pounds/week. 
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I bought the bodybugg when I  was running and I couldn’t figure out how much I could eat for each activity.  Of course, as life would have it, I haven’t run in ages.  When I have a normal sedentary day (including a 2 mile walk to/fro work) I need to eat fewer than 1500 calories/day.  I had tested this a year ago.  My problem is that I believe the bodybugg and not my past experience.

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Yeah.  I’ve definitely fallen off the wagon.  I have to admit that it is hard to get back on track. 1500 seems like so much less than 2000. 
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Ugh, so here I go again.  Tracking calories under 1500, I’m still not motivated to run, but I am going to be more active with the walking.  Dan and I have set up our spare bedroom so that I can just plug and play.  Right now I’m addicted to Bones, it’s helpful that it’s over 40 minutes long, that doubles my workout!  Also, I’m not going to listen to the body bugg except for the difference between a super active day and a regular day.
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Do you ever try to outsmart your body?