http://www.perlmonks.org?node_id=1199166

In "Tk label width to fit in text area", when viewed as "Replies are listed 'Oldest First'.", there are two nodes, listed in the following order, with these title bars:

Re: TK LABEL WIDTH TO FIT IN TEXT AREA [id://1199162] by Anonymous Monk on Sep 12, 2017 at 14:35 AEST ... Re: TK LABEL WIDTH TO FIT IN TEXT AREA [id://1199161] by Anonymous Monk on Sep 12, 2017 at 14:35 AEST ...

Everything about these two nodes is identical except for the node IDs. [In fact, #1199162 had been considered for reaping because it's a duplicate: that may have happened by the time you read this.]

Anyway, on the basis that #1199161 was created before #1199162, #1199161 should be displayed first, i.e. the current order reversed.

As I've no idea of the code behind this, I can really only guess, but perhaps where the timestamps are identical, something akin to this could be added to the current sort functionality:

... || $a->{node_id} <=> $b->{node_id}

— Ken