I would recommend more females before you add a male; or be ready to separate the male from the females in the spring for several months. Drakes will mate the hens all year, but in the spring he goes into an insatiable mating frenzy. I had one drake with 6 females and he ravaged them. It got so...
I have been lucky with a 100% hatch rate in 4 different hatches in two different incubators and in all cases I've smelled the faint rotten egg smell in the last few days prior to hatch date. Maybe my nose is slightly more sensitive?
I've noticed that my incubator gets stinky (like rotten egg) near hatch date even with all good eggs. In my experience, the smell has never been intolerable, but it has been noticeable, and is usually just noticeable when I get close to the incubator. Even a couple feet away from it I cannot...
I suppose it's possible that the shells were too hard (perhaps the jenny had too much calcium in her diet), but my ducks (especially the Pekins) have extremely hard shells and have always hatched (100% hatch rate on my ducks), but they take longer from internal pip to external pip and zipping...
It's easy for me to tell you to start over because they aren't my eggs.
If you really are at 14 days you should at least be able to detect an opaque/black dot about 1/4" or greater in diameter (with or without veining). If you cannot detect even a dot within the egg then there's nothing there...
From the angle of the photo it appears that those eggs are not developing at all; if the photo was taken from above (since the embryo floats to the top) then we could say a little better. This is one of my Pekin eggs at 7 days so your eggs should have something more in them than this as they are...