first I never get get the same pricing ... 28.72 CDN to 35.99 CDN..
Don't know that you mean with "same pricing". We don't control exchange rates so, the conversion between USD and CDN is made automatically by Digital River, but of course you can manually choose to be billed in USD, if you think your bank will give you a better exchange rate ( this is usually the case ).
And, of course, the advertised price is without any sales tax/vat, which might explain another part of the price difference.
Secondly what code do we use to have the upgrade rebate ?
If you bought KORD V2 from our site, you will receive an email with a special purchase link on the same email address you used back then. Emails are still going out now so, if you haven't received it yet, wait a few hours.