Leo eggs candling yellow

How long do you guys leave eggs that candle yellow in the incubator? Out of 9 eggs so far 3 of them appear to be yellow inside. The others are pink and I can see veins. I had one go bad and mold, but the other yellow ones still pretty much look the same. How long do you guys give them?

How long since they have been laid?

I would say about two weeks or so.

Any ideas from the night crew?

I never had leo eggs, my girls is only 6 months old. But with my corns eggs I kept them in until they molded. My first clutch was 21 slugs and 5 that looked like they could be fertile, I kept them until they molded.
I had this odd corn egg get laid 2 weeks ago
http://i77.photobucket.com/albums/j6...fly/006-32.jpg
And here it is after candling tonight :)
http://i77.photobucket.com/albums/j6...fly/011-18.jpg
It almost never made it into the incubator. I stood between the trash can and incubator deciding what to do. Never give up until it's you know 100% it's not fertile.