홈페이지 메인슬라이드가 가끔 순서가 섞이거나 버벅대는데요. 어느부분을 수정해야할까요? 채택완료

</p><p>$ms_img_sql = " select ms_location, ms_filename, ms_site_link from main_slide where ms_device='pc' order by ms_location asc, cast(ms_order_num as unsigned) asc, ms_num desc";
$ms_img_result = sql_query($ms_img_sql);
for ($i=0; $ms_img_row=sql_fetch_array($ms_img_result); $i++)
{
 if($ms_img_row['ms_location']=="1"){
  if($ms_img_row['ms_filename'])
   $slide1 = G5_DATA_URL.'/mslide/'.$ms_img_row['ms_filename'];
  else
   $slide1 = G5_DATA_URL.'/mslide/no_slide_img.png';
  $slide1 = '<img src="'.$slide1.'" alt="">';
  if($ms_img_row['ms_site_link']<>""){
   $slide1 = '<div><a href="'.$ms_img_row['ms_site_link'].'" border="0">'.$slide1.'</a></div>';
  }else{
   $slide1 = '<div>'.$slide1.'</div>';
  }
  $main_slide1 .= $slide1;
 }else{
  if($ms_img_row['ms_filename'])
   $slide2 = G5_DATA_URL.'/mslide/'.$ms_img_row['ms_filename'];
  else
   $slide2 = G5_DATA_URL.'/mslide/no_slide_img2.png';
  $slide2 = '<img src="'.$slide2.'" alt="">';
  if($ms_img_row['ms_site_link']<>""){
   $slide2 = '<div><a href="'.$ms_img_row['ms_site_link'].'" border="0">'.$slide2.'</a></div>';
  }else{
   $slide2 = '<div>'.$slide2.'</div>';
  }
  $main_slide2 .= $slide2;
 }
}</p><p>