I used to work for a major online coupon website, so I know a bit about online affiliate marketing and tracking links.
Office Max using tracking links (they're a part of the Google affiliate network) to place orders from 3rd party sites. You have to be logged into the 3rd party site (like US Airways) for the link to work correctly.
Once you are logged in, click on the Office Max link:
http://www.usairways.com/en-US/divid...html#OfficeMax
Once you outclick, it will take you to a URL where you should see this:
"affiliateLogin.jsp?affcode=usairways" as part of the URL.
Even though the page doesn't display anything, it's working correctly. Just click on the Office Max logo and begin shopping. This tracking link will follow you throughout your Office Max order.
Also from experience - social media teams and/or call centers don't always know how affiliate marketing works, so they may not explain how it will track your order very well.
If you want to cover all your bases you can always enter your DM# into the Purchase Order section when you check out. This number shows up on your receipt in case you need to dispute it later.
Hope this helps