I have only read the first one, and we did enjoy it.
I tend to read books in written order even if they are out of order chronologically, for example the Chronicals of Narnia, the written order is not the chronological order. Either way works, I prefer written order but neither order is right or wrong. 🙂
Written order would be: All of a Kind, More All of a Kind, Uptown, Downtown
Looks like Chronologically it is: All of a Kind, Downtown, More all of a Kind, Uptown