Controlling the Post Location of the Quiz.

I’m having this same problem.

Also, it incorrectly shows on all paginated pages of the quiz.

I noticed your code reads:
$buffer = preg_replace(‘/<div class=”qcontent”>
However, the div ID is actually “content.” I tried changing it to “content” but nothing changed. However, the function “callback($buffer)

Here is a summary of the problems and what I’ve fixed:

Problems
1. Duplicate pre-quiz content
2. Error messages on last page of multi-page quiz which also cause the score not to display and say “quiz can’t be automarked.”
3. Pre and post content displays on all page – not good if the prequiz material is “Start the quiz now!”

Here is what I got done today:
Re-coded the content buffer function so that only one copy of the pre-quiz message is displayed. See below

function callback($buffer) {
	// Grabs the actual page content (with shortcodes etc.)
	  global $post;
	$pageContent = get_post($post->ID);
	$content = $pageContent->post_content;
	//load data to pass through if not a quiz/survey

	// Checks if it is a quiz/survey before removing the content and replacing etc.
	if (strpos($content, "[wpsqt_")) {
	      // Splits it to before shortcode and after
	      $contentSplit = preg_split('$\[wpsqt_(quiz|survey)\sname\=\"(\w|\s)*\"\]$', $content);
	      // clear out everything in the qcontent ID
		$buffer = preg_replace('/<div class="qcontent">(.)*?<\/div>/s', '', $buffer);
              // clear out everything in the content and before the pre-div.
		$startPoint='<div id="content">';
		$endPoint='<div class="pre-content">';
		$newText='';
		$buffer = replaceTags($startPoint, $endPoint, $newText, $buffer);
        // Replaces the pre and post content divs with the content we split above
	      $buffer = str_replace('<div class="pre-content"></div>', '<div class="pre-content">'.nl2br($contentSplit[0]).'</div>', $buffer);
	      $buffer = str_replace('<div class="post-content"></div>', '<div class="post-content">'.nl2br($contentSplit[1]).'</div>', $buffer);

	}
  // Returns the buffer for output
	return $buffer;
}

function replaceTags($startPoint, $endPoint, $newText, $source) {
    return preg_replace('#('.preg_quote($startPoint).')(.*)('.preg_quote($endPoint).')#si', '$1'.$newText.'$3', $source);
}