incubator temperatures

I would not worry so much about the low temp - too high can kill them, too low will probs just slow them down a little bit. Is your incubator an automatic turner? If not turning them regularly in  the first week is very important i try to do 3 times a day to start with and then drop it to 2 later on and then not at all for the last few days. To make sure i keep track of the turning i put an X on one side and a O on the other and just make sure they all show the same .