The ones remaining in the eggs have a yolk sack attached, and will probably
hang out there until the yolk's absorbed. My suggestion would be to leave
them alone; they'll emerge when they're ready. The remaining egg just might
need more time.
You might, if you have not already, think about a separate tank for these
babies. The ***s can be rough to live with. They don't leave food for
the small ones, and sometimes view the small ones as snacks. I have a
five-year-old red-eared slider who still has a noticeable dent in the rim of
his shell from a bite four years ago. And he's still paranoid from it!
11. Painted Turtle!