Before your next hatch, get a good thermometer and hygrometer and test them. The methods can be searched here. Make note of any discrepancies and then compare to your incubator. It's not uncommon for incubator readings to be off, sometimes more than you'd expect.
^^ This!
I bet the incubator meters are incorrect.
Also maybe check out the Red link in my signature box below. Humidity isn't a set number for everyone. You need to find the numbers that work for you.