Where did you guys come up with the 14-days?
If you order from NDC you get a 30-day return policy. So you could send the shoes back for a refund of the higher original price and order a new pair at the discounted price. Confronted with the knowledge that essentially you're sending back a perfectly good pair of shoes at their expense, they'll price-adjust within the 30 days.
I've had this issue and for me it has been no price adjust, so rather than spend time discussing with a representative for me it has been easier to just buy the discounted ones and return the old order. Have done it several times.