I've got the same problem - I recently bought my 2012 MBA from the UK Apple Education Online store and understood that 3 years repair warranty was standard for Macs ordered via the UK Education Store (again - I saw the same information as the screenshot posted earlier on the order page), yet when I checked for what coverage I had online (here:
https://selfsolve.apple.com/agreementWarrantyDynamic.do) it says I only have one year of repair cover! Perhaps I need to enter some Applecare Code, but nothing came with the machine!
When I was configuring my MBA in the Uk Edu Store, under Applecare it said:
"Every new Mac purchased from the Apple Store for Higher Education comes with
complimentary telephone technical support for one year from your Mac purchase date and three years of repair coverage. With the AppleCare Protection Plan Uplift (AdditionalTelephone Technical Support), you can extend your telephone technical support to three years from the computer's purchase date. You can call Apple's award-winning experts as often as you like and get your questions answered."
All the "AppleCare Protection Plan Uplift" seemed to do, though, is to extend the telephone support for 3 years, as the repair coverage is already for three years and to do this costs £48:
APPLECARE PROTECTION PLAN UPLIFT MACBOOK/MACBOOK AIR/MACBOOK PRO 13" (HE CONTRACT) [+ £48.00]
I have sent a complaint to Apple, am not sure when/if I will get a response...