In Saved Reports there is a column called Type. It's not clear how this column is populated. There are no options to specify type when creating a report from SQL. In step 2 of the a guided report the user can specify a report type such as tabular, summary, or matrix. However those selections are not passed to the saved reports table. At a minimum this is a documentation needed bug, but could be a full fledged bug if there is not a way to populate the column from the UI (that is if it is supposed to be possible).