It is normal for the baby to move while you are having contractions. When you get hooked up to the monitor s at the hospital they explain to you which ones are the babys kicks and which ones are the contractions. You just have to pay attention to the contractions more so you can tell the difference between the babys kicks and movement from the contractions. Sometimes you can get confused from the babys movement and the contractions. I hope this helps. Good luck:)
I asked at my last appointment and my dr said some babies move during bh or contractions and some don't. My son moves constantly during my bad bh.