Originally when you imported furniture the object had to be in a category. This landed a lot of furniture in the Bathroom category because that was the first in the list. I think it was in version 7.02 that a checkbox 'Add to catalog' was added which lets you choose whether or not to add your import to a category. Unchecked the imported object was not added to the catalog. In 7.2 The User category was introduced as a default category. With the checkbox 'Add to catalog' unchecked imports were still added to the catelog in the User category. With the checkbox unchecked the import should not have been added to the catalog at all. In the latest 7.3 beta-1 this is solved so that when 'Add to catalog' is uncheked the import is not added to the catlog.