I watched as the pages on the nc turned without me touching the screen. This happened three times. Haven't been on it today but if it keeps happening I will be calling customer service. Just wanted you to know about this glitch.
Lots of threads about it. It is a known issue. Contact customer service. Tell them you would like another nook because yours is having sensitivity issues.
http://bookclubs.barnesandnoble.com/t5/NOOKcolor-Technical-Support/Nook-Color-Touchscreen-Freaking-Out/m-p/739243#U739243 (Large discussion about your problem)
http://www.youtube.com/watch?v=LiHH6mdH0WU (Youtube video)