Hello -
First off, there is nothing now viable in any of those discolored eggs. They should lift off very easily. I would suggest that you remove them so you won’t have to keep obsessing about whether or not they will harm the remaining possibly good eggs. Maybe they wouldn’t, but why worry yourself? You might just leave that one to the left of the temperature probe in place until it turns those pastel colors to reassure yourself that you didn’t remove it too soon.
Get some scissors and open up the bad eggs. Have a look inside; dump out the contents and thoroughly explore. Do you see any tiny, rolled-up, unpigmented embryos inside? Then maybe (not positively, but probably) next time you need to change some of your husbandry or incubation techniques. Or is there no sign of a snake inside? Then probably those eggs were not good to begin with, and even perfect incubation would not have produced a different result.
Did you candle the eggs before you set them up in the incubator? After you remove the “bad” eggs you can candle the remaining ones to see if you see the characteristic network of blood vessels of a well-started fertile egg. I ask about candling because, despite what some people say, it is not always possible to tell if the egg is good just from an exterior visualization. Without candling, I think we often set up eggs in the incubator that are not fertile, or that have not started developing (and never will) by the time the female deposits them. By the way, are you sure your thermometer is accurate? Could it be registering lower than the actual temperature?
Sorry for the lousy outcome. But as we always say in Chicago about the Cubs – wait ‘til next year!
-Joan