Hatching chicks from scratch

We hatched for the first time. Lulu sat on 6 eggs(a small or bantam cochin cannot keep more than that warm). It took about 3 weeks. They hatched over 4 days. We took the last 2 away so she would tend to her hatched babies. We tried to hatch them but couldnt.
We also ordered 8 babies just in case hers didnt make it. They sent the babies2&1/2 weeks early! So we have 2 batches.