Because of course it works this way. Why wouldn't it?
Anyway, the height (and hair length) TF is now split between them, so Rhoda's not as proportionately tall as she was, but still taller than normal, as is Catalina.
They're both smaller overall than normal, but not nearly as small as Catalina was.
The catgirl TF, meanwhile, is an either / or situation, so they're both catgirls now.