Hi

It seems inconsistent, org-sort numeric.

If org-sort numeric is applied to each of these one level headlines, the order is different in both (tested with emacs -q):

* Inconsistent org-sort. M-x org-sort numeric

** !Cuatro

** ~Cinco

** Tres

** 1

** 2

* Inconsistent org-sort. M-x org-sort numeric

** Tres

** !Cuatro

** ~Cinco

** 1

** 2