TicketyBoo, I was surprised mine were moving and chirping so much.. I didn't know they did that. Yours should be ok, but you probably should leave them alone since they are supposed to stay still after day 18.
Tell that to my hatched chicks though... I have two now 
 and they are scooting all of the other eggs around the incubator.
I can't believe I've hatched chicks!  lol   
 
Due to the high humidity here, incubator humidity was running 62-65% the first 18 days (now 67%).. So I'm happy that things are going well so far. They were officially due very late this evening.
Clearly I have a problem keeping my hands of too.. I was convinced that the second one had the shell dried/stuck on it's head, so I opened the bator to help. It was sort of connected but not dried....would have been fine without my help...
I should have reminded myself that dryness is unlikely to be a problem since the humidity is high.
I'm anxious about my Marans/Ameraucana crosses.. I bought a blue Marans hen that had been with a blue Ameraucana roo and I saved the first 5 eggs she laid for hatching... I sooo want chicks from that cross!! They were moving yesterday... oh, the waiting....