All dimensions are treated as alphanumeric strings. But certain dimensions will only contain Numeric Information. When these are sorted on a report, they will order themselves in an unlogic fashion (e.g. 1, 10, 11, 2, 21, 25, 3).
Suggestion is to change this behaviour for dimension that we know are numeric (count in session, or populated by an event that has a numeric value or count), or even have the option to define the sort-order manually, either a generic option string/numeric, or a fully organisable list, or both.