What has changed in the Views?
With Extender Enterprise, previously, when an Extender Window or Form had multiple Key Fields, the Key would be concatenated into one field and it could not be included into the View as two different fields. With the Microsoft Extender for GP 2010, the key field was separated into 2 fields for the View.
With Extender 2013, all Views will show the Key Fields individually and will not concatenate them together any longer.