Displaying items in order on webpage in order

Hello
I am looking for help to arrange (or re-arrange) my website items in order. Eg: sometimes I add the same item with a different quantity and would like this to show up next to each other.
Does anyone know if this is possible?

http://www.adfixironmongery.co.uk/?wpsc_product_category=rustic-rustic_and_hand-forged_ironwork

Appreciate the help
Paul