Glad that the other egg looked more like it should. Its fine to leave the one in the pictures in there, just in case, but I suspect it is dying or probably will before the hatch is finished.
And yes, an external thermometer is always a good idea, one tested for accuracy. I love Brinsea products, but even they can be inaccurate out of the box.
If you still don't see pips by this evening, you could check each egg individually. Or just keep waiting is fine too! If you decide to do it, just open the lid quickly, pull out one egg at a time, and replace the lid. It will release a little humidity, but will recover very quickly.
I see your eggs are sitting with the air cell toward the outside, try candling thru the window before you open the lid. We try not to open incubators too much late in the process, but if you don't have any pips yet, there is no real danger. (just don't drop the egg! lol)
If you shine the light just right from outside the window, you can sometimes see the air cell. At this point, you are looking at least for "drawdown" as the baby gets into hatching position, the air cell draws down toward the floor and more into the fat end, and gets kinda out of shape, like the pic below. This happens shortly before internal pips. If any are internally pipped you might see a pointy shape inside the air space, which would be a beak broken thru membrane into the air cell.
View attachment 1751582
Spirit
Greeter
Friend
