[just_me]

Sorry 'bout that. I forgot that I made a new template called dialog_nosort.tpl under customer/ to remove the sorting feature which I found useless. Since as I only put 3 bestsellers, what's to sort?

Solution for you, change "customer/dialog_nosort.tpl" back to "customer/dialog.tpl"

You'll find this code at the bottom of the bestsellers_r.tpl

{/capture}
  {include file="customer/dialog_nosort.tpl" title=$lng.lbl_bestsellers content=$smarty.capture.bestsellers}
{/if}

and change it back to

{/capture}
  {include file="customer/dialog.tpl" title=$lng.lbl_bestsellers content=$smarty.capture.bestsellers}
{/if}