Unfortunately, that is not possible with hole charts. Be sure to put in an enhancement request on the SW Customer Portal.
I have to say, having no ability to order the hole tags makes hole tables somewhat worthless to me.
For example, rev A of a print has A1 as a particular hole. In rev B of a print a new hole is added, and the hole table wants to call what was A1 A5.
This makes the drawing difficult (to put it mildly) to check agains the previous revision.