I'm sorry

that sucks. My guess for the reason why she couldn't let you move your seat was because it was a weight and balance issue. On small regional jets, they count the empty seats and run it through the flight computer to see if the aircraft is safe for takeoff.
If I were on the flight I would have let you move after takeoff when the 10,000 ft. altitude has been reached. Weight and balance is really only critical for takeoff. With that said, I think weight and balance issues are so dumb to begin with. You weight 120 pounds, is it really going to make a difference? But they have to really... if you were to crash they would look at the weight and balance and if they found that it was out of takeoff parameters, the outcome would be crew error.
One thing that I think you should consider is that because your flight was on a regional jet, the pilots and flight attendants weren't actual continental employes. They work for an airline that flys under the continental brand. The experience you had on that flight is really not an accurate representation of flying continental airlines.
And you can't see the flight attendant training manual, silly!! lol that would be the biggest security breach ever! :P