[eluser]toopay[/eluser]
I re-ordering your model lines, just for more intuitive feels, its more make sense (and more easy to read) for us(especially me), by ordering '$this->db->' statement to 'select', 'from', 'join', 'order_by', 'limit' than what you have in your model right now.
But it just my suggestion (which means MY CODING STANDARD), you can take it or stay with yours, that will be no problems.