You have managed to disconnect these folders from the Outlook Address Book
with all this importing. This is one of many reasons we continually advise
against importing PST files. Next time just open the PST file and copy the
information you need from it, don't import it.
You should be able to repair the Outlook Address Book by removing it from
the profile, restarting Outlook, then re-adding it. Once the OAB appears in
the list, select it and then click Change to make sure the Contacts
folder(s) you want to display are listed.  If any of them aren't listed,
you'll need to enable those Contacts folders as Outlook Address Books by
right clicking the folder, selecting Properties, clicking the Outlook
Address Book tab, and checking the "Show this folder as an E-mail address
book" box.  Make sure you restart Outlook after making these changes.