Sometimes you want to use the <-more-> tag to link to the full post. That being said, the only problem with that is that it jumps to the part where the tag was added. Here a function that removes the jump.

Remove jump from <-more-> tag.php

// Remove jump with <-more-> tag
function remove_more_jump_link($link) {
  $offset = strpos($link, '#more-');
  if ($offset) { $end = strpos($link, '"',$offset); }
  if ($end) { $link = substr_replace($link, '', $offset, $end-$offset); }
  return $link;
}
add_filter('the_content_more_link', 'remove_more_jump_link');