If you had two bad eggs, there is a good chance this one is bad as well. Any time I have had a bad egg, there was more than one and they were all in the same vicinity. Although, usually once the bad eggs are removed, the smell goes away (as long as they didn't break). So it sounds like there is still a bad egg in there.
I would remove that egg immediately. Wear gloves, long sleeves and have a plastic bag ready to place it in. You do not want it to burst inside the incubator, or on yourself.
Good luck with your hatch! Sounds like the rest of them will do just fine!