Google is going through a lot of growing pains right now as they transition Places to Google+ Local. You may have also noticed that reviews have disappeared, pictures and videos have changed - or like your listing, the categories and/or address might have reverted to old listings.
The advice given on the Google product forums is to "bump" your listing by going in to edit the places listing and just clicking submit at the bottom. This might trigger the correct listing to appear. However, if this doesn't work the answer is to submit a problem with the listing using the report a problem link inside the new places page. Google will look at it, but given the huge backlog of issues right now, it might be a few weeks.
I'm going through this myself with several client listings.