I think those are pretty good odds.
I cut my clutch on day 56, when the first hatchling pipped. That one came out of the egg within 5 hours. Another one came out the next day, and the last 4 all piled out on day 59.
I'd say keep them in the incubator and mist the eggs lightly once or twice per day to keep the eggs moist and the edges of the cuts you made from getting hard. They should come out within the next few days.