Rules Interface unresponsive and odd
That data selection interface often has jQuery Update-related issues; for the most part those should be solved by using the dev version (at the time of this answer) of jQuery Update and the current stable of Rules (7.x-2.7) as recommended by https://www.drupal.org/node/1810656#comment-9298435. That issue also has a good history of these problems.

Another issue appears to describe your exact issue and has a patch. It sounds like that resolved the problem, so future visitors might try that as well after seeing if updating jQuery Update doesn't work.