It can take a long time after they pip. They rest and absorb the yolk after they pip so should be fine. It can take over 24 hours after pip to hatch, some longer. Just make sure your humidity is up and don't open the bator.
Yep tha's right ! If you can get water in without opening the bator great. Try to keep Hum up so they don't stick to the shell. I use a straw and dribble warm water in the vent hole and then put the plugs right back in. Good luck and be patient !
No some are just slow, probably wants to be last. What day are you on? Try not to worry to much, it seems like that makes it last alot longer, they know its bothering you.
If the pips are that early, you definitely have nothing to worry about yet with the un-pipped chicks -- they just don't want to come out yet. I read somewhere that the trigger for pipping had to do with the amount of gases built up inside the shell and the chick's need for more oxygen. That could have something to do with the early pips not zipping -- the chicks needed air, now that they've got a fresh supply they can wait a little longer before finishing the hatch, getting stronger while they rest. Hatching too soon, before the yolk has been completely absorbed would have been bad. Be encouraged, it sounds like you're ok.