I've got something strange...
My third child, when having only 1 row, it's not showing the row.
I took a screenshot of it
http://picasaweb.google.com/gerbrand.adlogix/TelerikViewIssues?feat=directlink
I'm not doing anything special in my code to make the grid. I've got it only with one record. When I have more records, I get to see them.