My Type Space view looks similar to what you have, but the "ExtJSTL-4.1.zip" is not there. It appears as though no matter what I try doing I cannot get the internal ZIP file in the ExtJSTL-4.1 project to load.
If you are still experiencing this issue I suggest you update to Sencha Eclipse Plugin. 1.1 version was released on 11/6/2012.
To upgrade go to the support portal (support.sencha.com) and downloaded the latest Sencha Complete installer, or the unbundled installer that's on the portal.