Well, I candled the eggs in the Brower incubator, and I'm still 99% sure none of them are still alive. I'm more or less just letting them go because they don't stink and it doesn't hurt anything.
I candled two of the eggs (#3 and #4) in the Brinsea, and they are both alive and moving. I'm surprised at how much of a difference just a day or so makes. Already they are much darker in the shell, and it's a lot harder to see anything. Since the first two were so much harder to see, I left the rest alone. I am going to attempt to not mess with them any more as far as candling goes until day 18. I figure that each time I take them out, I run the risk of either breaking one, or introducing bacteria.
I am still extremely worried about the air cell issue. It would be heartbreaking to lose these chickens that close to the end due to careless post office handling. I guess there's not much I can do, other than to keep my fingers crossed.