Repeating templates when selecting template in Blog app

When I want to select a different default master template for my blog I see repeating template names in the list. (see screenshot)

screenshot from perch panel

This has probable to do with that the perch_blog folder also contains the template folder (with templates) but i'm not sure.

Perch Runway: 2.8.29, PHP: 7.0.8, MySQL: mysqlnd 5.0.12-dev - 20150407 - $Id: 241ae00989d1995ffcbbf63d579943635faf9972 $, with PDO
Server OS: Linux, fpm-fcgi
Installed apps: content (2.8.29), assets (2.8.29), categories (2.8.29), perch_blog (5.0)
App runtimes: <?php $apps_list = array( 'content', 'categories', 'perch_blog', );
PERCH_LOGINPATH: /perch
PERCH_PATH: /var/www/vhosts/nieuweavonturenvan.nl/httpdocs/perch
PERCH_CORE: /var/www/vhosts/nieuweavonturenvan.nl/httpdocs/perch/core
PERCH_RESFILEPATH: /var/www/vhosts/nieuweavonturenvan.nl/httpdocs/perch/../resources
Image manipulation: GD Imagick
PHP limits: Max upload 16M, Max POST 8M, Memory: 128M, Total max file upload: 8M
F1: 2edba60ed1f613d6dd804feb202456a2
Resource folder writeable: Yes
HTTP_HOST: nieuweavonturenvan.nl
DOCUMENT_ROOT: /var/www/vhosts/nieuweavonturenvan.nl/httpdocs
REQUEST_URI: /perch/core/settings/diagnostics/
SCRIPT_NAME: /perch/core/settings/diagnostics/index.php