Creative is taking 2 separate feuds and, hypothetically, making them into one. Both Charlotte and Becky have unfinished business with Ronda but their feud with each other should be over. There's no reason for a triple threat when everybody wants to see Becky/Ronda way more than Charlotte/Ronda. It's like having a Rock/Austin feud and throwing Triple H into it.
The lack of pecking order within the WWE Roster has lead us to this point.