newbie needs your egg thoughts (warning- poop pic)

so yesterday afternoon our Australorp laid her first egg (the first of our foursome to do so).
It was small and peach and perfect...
though she did lay in up in the PDZ of the poop tray. Good times.

anyway- this morning when I went out to check on the ladies- I saw this on the poop board under the perch where they sleep-



so- this brings up a few questions-

1- that's a shell-less egg, right?
2. do we think the same chicken (the Australorp) laid that? is it possible she laid more than one "egg" in less than 24 hours- maybe that's why it's shell-less? Or is that from a different chicken? (just seems weird that another would be laying for the first time the very next day after our very first egg)
3. see the wet sandy area around the poop? what's up with that? one chicken (maybe the Australorp- I don't know what order they sleep in) has had a wet sand spot for a few mornings now... ideas?

ok, sorry to get all gross and graphic- but you all are the only people who will be in the know on this... thanks!