Two points:
1) on the staggered hatch... Come day 18 lay paper towels over the new eggs and under the older eggs so when the hatching chicks get out and get messy, you can keep the goo off of the the new eggs and they can still "breath". After the hatch is over, take the later hatch out, wrap them in a towel and place in a really warm area while you clean your bator. With my styro, I usually take the lid off and set it heat element down on a counter top so it retains heat and clean the bottom. I then wipe the windows free of chick dust, fill a large rubber made disposable container with a lid full of very hot water and put the bator back together, placing the eggs back inside a little ways away from the container. The radiant heat will quickly bring your bator back to temp. I have had excellent hatch rates doing this. Edited to add: to compensate for the humidity... let the humidity drop down to 30 or so for a day or two just before day 18 on the second batch and then up it when you should.
2) on the shipping... My very first eggs that I ever received in the mail were shipped in wood shavings and wrapped in paper towels. All made it and four hatched out under a broody. It was such a positive experience that I did it again. Since then, I have had eggs sent and wrapped in every manner you can name... bubble wrap, newspaper, paper towels, just egg cartons and that is from people on the original BYC,
Ebay, Eggbid, and yahoo Egg Groups. I found it isn't what the eggs are wrapped in that necessarily makes for a successful shipment. How the box is handled and how secure the eggs are in the box is more important.
Many people aren't comfortable with wrapping in bubble wrap, they feel it won't allow the eggs to breath properly. This is often discussed in some of the serious hatching groups on yahoo. The pictures you showed looked exactly like some that I received last year. In most cases, the eggs had been bubble wrapped, in cartons, in packing peanuts, some with labels on the outside, some not marked. It did not matter. This must be a decent seller, they are wanting to send you more at no charge, that shows you something. These things happen.
Oh, and for everyone one who thinks the labels are bad... I have had eggs "babied" by the postal service because of labels like "handle with care" "hatching eggs" and the like. To the point where I have been called in the middle of the night to be told eggs have arrived, on Sundays, and even holidays. There is no sure fire way to guarantee that eggs will arrive safe. I have also received boxes that look as though they have been dropped of a cliff, and others that looked perfect until you opened them and found 80% of the eggs destroyed. When I find the smuck who hates eggs at the postal service, I am going to smack him around because he is giving everyone else a bad name..
I will tell you that newspaper is MY least favorite packing material, I do prefer something more secure that won't condense if one egg does break. Kentuckysilkies hooked me on the double box method, I feel more secure thinking that it would take a tank to flatten the box. It isn't fool proof but nothing is.
I would ask the seller to use a different packing medium then newspaper... just to be on the safe side as that angry postal work seems to work somewhere between your two addresses...
Here is an example of bubble wrapped eggs, the chick on my head in the photo is one of two chicks that survived this box. This package was sent by a very popular seller on this board who is often commended on their shipping, it just proves that it can happen to anyone.
