Linking 3 items

Hi,

 
I'm unable to link 3 items in the TPlanner.  2 items is working, but when I link a third item, only 2 of them are moving when dragging.
Is there an example available ?
 
Many thanks
ETS

An item can only be linked to one other item. You'd have to do linking like item A -> item B -> item C -> Item A

Thanks !