Hmm, it's a perplexing "caboodle" for sure! (PS am I the only one old enough to actually know what a caboodle is?

)
Before I go any further, did you reset the number of days to hatch on your NR360 to 21 when you put the new eggs in? Because it has an automatic shut off 3 days before hatch if you leave it on 0 the turner doesn't turn and eggs not turning properly often results in quitters.
Did anything else go haywire at hatch for the chicks that did develop properly? Early, late, sticky, hernias, anything out of the norm?