Took me ALLLLL day, but I finally tried another angle and have resolved the issue. I still have no idea what I did, but I suspect I may have duplicated the ad_post code somehow.
Additional information: Here’s a snippet of the code found in & around line 68 that it seems to be referencing for some reason.
65 function post_footer() {
66 if (is_single())
67 {
68 ?>
69 <div class=”postauthor”>
