You're probably just waking it up lol. Even my pricey incubator, a Brinsea 56EX has one tiny little hole. That's enough apparently as they hatch fine without intervention.
I know how tempting it is, but I've had to just walk away and find something else to do many times so I wouldn't touch...
Nope, they can take 24 hours. I just had one the same last night. This morning it was still sitting there zipped but not out. I had to get those other ones out and he was zipped enough I was sure it wouldn't hurt him. I left the incubator open while I ran the other 9 to the brooder and when...