Whatever you think they did wrong? It TOTALLY wasn't their fault.
I'm really fickle when it comes to making up children for pairings. One minute any given couple might have a single daughter, and the next they have a mess of 5 ankle-biters running around. So, given that, these girls have no names and no set bending abilities. (Katara and Aang's daughter is definitely the instigator of nearly all shenanigans, though.)