The Bator stink is most likely a egg that has a crack the was not noticed, and now bacteria has set up camp. They will look weepy most of the time. I would not open long enough to clean it proper. It would be a good thing to locate the stinker thou and get it gone. Be careful thou, if its built pressure, they can BLOW when moved and its bad, real bad....
Your curled toes is likely from a combination of low humidity and long time span between pip and hatch. I sponge in a cup of water is your friend. If they pip thru the membrane and just sit a long time, they want to dry out and shrink wrap right there. If they do hatch, its slow and some end up bad feet. I find the last ones to hatch of the batch are more prone to it. Some have had luck with band-aids on the toes, If they dont straighten out on there on I cull. remember this is my opinion, and worth what it cost.... Bill