Moderators have infinite undelete votes, but that's not the case here.
The cause for deletion is automatic process that deletes old, closed and unanswered questions, process that as of June 2013 runs daily.
Now as for the increasing undelete votes, those votes don't get reset when the post is undeleted thus get "stacked", most likely a bug.
Until the bug will be fixed and delete votes will be cleared, one way to stop the endless battle and avoid insanity is to simply reopen the question thus it won't be auto deleted anymore. (Unless having 0 or negative score, but that's a different story)
Post Undeleted by Double AA♦, Double AA♦, Double AA♦, Double AA♦, Double AA♦, Double AA♦, Double AA♦, Double AA♦, Double AA♦, Double AA♦, Double AA♦, Double AA♦, Double AA♦, Double AA♦, Double AA♦, Double AA♦, Double AA♦, Double AA♦, Double AA♦, Double AA♦
respect
for him!