Quote: oh no keep on trucking! keep going until you see no movement or.... I will go into something else below if your up to it...
But first... Cant blame it completely on one or the other as TEMPS and Humidity play a great role in incubating and they do it together.
Could be a combo of the cold spots we discussed along with too high humidity. Next hatch I suggest weighing your trays as suggested in the hatching 101 article
https://www.backyardchickens.com/a/hatching-eggs-101 calibrating and being SPOT ON. and marking air cells and really learning what those air cells should look like at certain days in your incubation.
Now, read that assist article again and again.... I would def give them more time at low humidity and watch for pips and movement. if your noticing some of them are no longer moving like they were on day 23-24 I would use one of these eggs to investigate.... by creating an artificial pip and making it a little larger as a veiw hole or even removing the fat end ABOVE THE INNER MEMBRANE air cell pencil marks, if you go below you are headed directly into active membranes, but if you just remove the inactive shell ABOVE the membranes your ok! when you do this you can wet a clean finger and get the inner membrane wet and see whats going on, if its white and stuck to him, if he has alot of fluid under the membrane, if he moves and so on, BUT DONT remove ANY INNER MEMBRANES.