I always run my bators on the dry side -- I keep the bator in my utility room when incubating - it tends to have more stable temps than other parts of the house. I keep my humidity levels around the mid-30s - I've had better hatches like that. Add only a very little bit of water at a time & wait about 10-15 minutes before adding more to let things stabilize in there. I think the eggs will be all right; for sure I wouldn't pitch any of them unless I smelled one going bad. I also have hatched porous eggs. When I only had the old styrofoam incubator, it was so bad for spiking temps & humidity that I bored a hole in the top & ran a piece of aquarium hose down into it & used a syringe to add water when needed--I opened it as little as possible. I don't know if this helps you or not but hope so - just remember, eggs can take a lot & still hatch!
Here ms. Chickenlady.
Pam