I must have missed how many eggs a day you are getting, I'm thinking it was close to half a doz.
For the eggs, you don't want to put them in an incubator on different days unless you have a hatching incubator. Even with a hatching incubator you want to add eggs to the incubator at least 1 week apart. To explain why: on day 18 or when you see an internal pipping using a flashlight, you enter the lockdown stage. During the lockdown stage the humidity is increased and for some birds the temp nudged down. Either of these would not be good for eggs that were not ready for lockdown. Once in lockdown you are not to open the lid unless there is an emergency. I have opened the lid once chicks are dried off while there are other eggs still trying. It is not the best and I won't do it on shipped eggs or hard to hatch eggs. So if you ae putting the eggs in on day 1 and want to add eggs on day two, the recommended method is the store fat end up in a brreathable carton using the seasaw method until you have either collected eggs for 5 days or reached the number of eggs you want to set for that week. I set my eggs in the afternoon to evening with no issues. Once I have the eggs I would not leave them in a carton overnight just to set in the morning Unless I was going to be gone around day 21.
As for adding water I use the sponge method. I got cheap sponges from target and I cut them to varying sizes. I then add or remove sponges as needed. I walk by my incubator at least 5-7 times a day but I try to only adjust the humidity every other day or so.
For adding water during lockdown, I keep straws that fit down the vent hole. Then I make sure a sponge is under the vent hole and only if needed do I had a few strawfuls of water. But for lockdown I typically have more than one sponge in the incubator and I also have a babyfood jar of water that is more marbles than water so the chicks can't drown. The jar is more to relieve my mind of the idea of a chick not having water for 2 days.
I have 9 eggs. They are from 9 days ago until today. I'm not sure which ones are which because I forgot to mark them. Now what? lol. My incubator has an egg turner, so where would I put the sponge?