[GNC] Assigning payment inside a split

[Jediator]

I was trying to assign a payment to a transaction inside a split (a 
parent transaction).  However, to my surprise, this action resulted not 
only the child entity assigned as a payment, but also the rest of the 
siblings merged together and assigned as a payment to the same bill.  I 
ended up with loosing the split completely, and the bill got messed up 
as well.  Is this a bug or did I do something wrong here?

Using GC version 5.4 on Mac with Postgresql as the back-end DB.

Thanks in advance!  -- JC