Pips! Finally! Questions about "late bloomers"

So I did a bad thing. On day 24 husband and I opened an egg, to find a chick inside. Last night, I did two more of the 4 remaining eggs, because I need to know if they're coming or not. I have more eggs settling as we speak, and I need to clean the bator and prepare it for them. Humidity is way to high to set them since I have membranes all over the place exposed.

3 I can see, in there "swimming" around. The final one, pipped last night and I saw it this morning. So, all 4 are still alive on day 27.

Will they be normal? Will they be deformed? Will they have issues? Anyone else have any come out this late or did you always toss before that without looking? I've done that before with eggs I left after the others hatched to give them time... but these are the only ones from the whole batch that made it, no "on time" chicks at all.

By the time the one who has pipped zips and escapes.. we'll be on day 28.

I wonder what happened to my thermometer, it must have moved. It's been reliable for a very long time and I've had lot's of on time hatches.

Lesson learned this time around, calibrate your thermometer before EVERY hatch. Or go digital like I'm going to for the next batch.