See screenshot: http://screencast.com/t/bjpmUBhLN5.
It is likely related to a filter "Show only top level items" in place. To clear the filter >> Navigate to the filter icon >> uncheck Show only top level items >> Save as default >> and you should be all set :-)
We have a great article in place about filtering in Clarizen,. please find more info here: http://usermanual.clarizen.com/#2-2-4-5-searching-and-filtering.
For further clarification, hop on our Intermediate Q&A webinars. These are great resources for visual answers to your questions and free consulting with our experts ( to register> http://www.clarizen.com/live-demo.html#second).