According to your expected results, you could create recursive hierarchy groups, please refer to this article: http://www.codeproject.com/Tips/860824/Using-Recursive-Hierarchy-Group-in-SSRS

If you want to repeat tablix header on each page, you could enable Advanced Mode by clicking down arrow on the right side of the Grouping pane. Then click the static member, go to Properties pane, set RepeatOnNewPage to True, KeepWithGroup to After. Just as the link posted above by other guy.