Can you see the 3 column KB Nested Content Element template in the border column in the picture below? If so, then there is nothing wrong with your installation.
The content element containers containing the text "Extension Templates Supported" are only for demo purposes and were not exported in the subscription version. This is only sample content and should be replaced or deleted where necessary.
Greg
----
Mediatech Consulting, Inc.
Phone : +1 (760) 525-1770 . Fax: +1 (760) 542-1990 . Skype: gremington
The content element containers containing the text "Extension Templates Supported" are only for demo purposes and were not exported in the subscription version. This is only sample content and should be replaced or deleted where necessary.
Greg
----
Mediatech Consulting, Inc.
Phone : +1 (760) 525-1770 . Fax: +1 (760) 542-1990 . Skype: gremington