Lol, that's what happened to me last time I hatched.. I set 30+ eggs figuring that some wouldn't make it. Well, they ALL hatched! So, yea, this time I set 48 eggs.. Guess I haven't learned my lesson yet. This hatch was not planned so the eggs could've been up to a week old, so I'm sure that doesn't help. I actually hadn't run my incubator since last August but I put the eggs in, plugged it in and it's been keeping perfect temperature for the past week. I was happy not to have to make any adjustments! I have a homemade incubator that I love! I can't afford to spend that much money so this was my less expensive option. It helps that my fiancé is an electrician. He made it for me last summer. I have to admit, I've become a lazy hatcher.. I add water about once a week and humidity stays around 35-40%. Instead of turning multiple times a day I've been tilting the entire incubator by putting something under one side of it, then putting it under the other side. I really turn them every night but I don't have the time turn 40 eggs that often.
Anyway, welcome and good luck