I wouldn't intervene, personally. If they can't make it out of the shell in their own, they probably won't have the vigor to survive. If you set them all at once, they should hatch all on one day. Any stragglers will most likely not make it... I would also recommend NOT helping them out of the shell, for the same reason.
I got great assistance when I hatched mine out; here's the thread for it
I think the early hatch may be attributed to a temperature or humidity issue, and IMO would not wait more than 24 hours for the other eggs, especially if shipped. Shipped eggs have a 50% hatch rate, so if you ordered 30, and 16 hatched, that's actually pretty good odds. Fresh eggs have better hatch rates Edited by shortgrass - 10/9/15 at 4:36am