HFM Plug account query

 I have a following structure in entity and transactions between Childs of B and E will eliminate at common top parent "A"

A --->Top Parent 

--->B

------->D

---->C

-------->E

In my case , Transactions within Childs of Parent B are eliminating at <Entity currency> of parent B itself because B is the common parent for them , B also shows some amounts under [Elimination] value member for the plug account is it because child of B has ICP transactions outside other hierarchies like C ? due to this for the plug account Proportion (which is eliminated amount within B Childs) + [Elimination] = Contribution Total