on the cararter load screen it dose not matter one bit. I have min all over the place depending on the account and when I created it.

The thing to remember is this if you want you teem to line up in a spicfic order such as

Xname
Aname
Bname
Cname
Dname

then you must create them in reverse order so make your toons in this order

dname
cname
bname
aname
xname

thus when you group they will be in order blizard dose this by create time and date