Chronological ordering of comments in mod queue broken

[JosephGubbels]

Expected behavior:
Comments in moderation queue for live convo should be ordered from newest (at the top) to oldest (at the bottom), in each of the three sections (unmoderated, accepted, rejected). Comments that are left in the unmoderated queue for a prolonged period (as other comments are accepted and rejected) should remain in the correct location (near the bottom, below newer comments).

Actual behavior:
Comments were ordering properly, but at a certain point the ordering broke, and comments that had been left in the unmoderated queue for a prolonged period were seemingly pinned to the top, with newer comments appear below them. When this happened, chronological ordering also stopped working in the accepted and rejected queues.

Additional context:
This was for a conversation with ~450 comments at the time of the error. The convo had been open for ~4 days. The improperly-sorted comments were over 1 day old.