In order to see if you have everything linked properly press the "H" button and check "Display subtree" The frame should be at the top of the list and all of the way to the left and the "children" will all be lower and to the right. EX:
Parent
--Child
--Child
--Child
----Child of child*
Other parent *
--Other child*
Ect...
*= most likely won't be in the hierarchy of your level, just for example.
*EDIT* Added dashes because spaces weren't appearing

Hope this clarifies it a little