Template override

I've copied and placed
/perch/addons/perch_blog/templates to
/perch/templates/blog/

When I go to create a new blog, I see this list of duplicate template files under Default Master Template. Is that normal or should I only see one set?

My basic diagnostic code

SUMMARY INFORMATION

Perch Runway: 2.8.18, PHP: 5.5.26, MySQL: mysqlnd 5.0.11-dev - 20120503 - $Id: 15d5c781cfcad91193dceae1d2cdd127674ddb3e $, with PDO
Server OS: Darwin, apache2handler
Installed apps: content (2.8.18), assets (2.8.18), categories (2.8.18), collection_8 (2.8.18), perch_blog (5.0), collection_4 (2.8.18), perch_events (1.9.2), perch_kraken (1.0), collection_1 (2.8.18), collection_6 (2.8.18), collection_5 (2.8.18), perch_podcasts (1.1)
App runtimes: <?php $apps_list = array( 'content', 'categories', 'perch_events', 'perch_podcasts', 'perch_blog', ); ?>
PERCH_LOGINPATH: /perch
PERCH_PATH: /Users/scottgruber/git/ioes-site/perch
PERCH_CORE: /Users/scottgruber/git/ioes-site/perch/core
PERCH_RESFILEPATH: /Users/scottgruber/git/ioes-site/perch/resources
Image manipulation: GD
PHP limits: Max upload 32M, Max POST 32M, Memory: 256M, Total max file upload: 32M
Resource folder writeable: Yes
HTTP_HOST: dev.environment.ucla.edu:8888
DOCUMENT_ROOT: /Users/scottgruber/git/ioes-site
REQUEST_URI: /perch/core/settings/diagnostics/
SCRIPT_NAME: /perch/core/settings/diagnostics/index.php