Tracking link at paypal confirmation page & reference

[outlet.ee]

On 1.5.2, the paypal payments work fine, the only issue is that on the bottom link 'track your order' or 'order history' if registred user lackt the parameters. the link is http://www.mydomain.com/se/guest-tracking?id_order=

 

Actually I would like to include the order number in the conformation text like in bankwire:

 

{l s='Your order number %s  is complete' sprintf=$reference mod='bankwire'}

 

Does anybody know how to fix the link on the bottom and get the reference number parameters working?