New episodes on Noggin - when will they ever air?

Each time I see the TV listings for Wow Wow Wubbzy on Noggin, they always list the same episodes over and over (Goo Goo Grief/Perfecto Party; Who Needs School/Magic Tricks, etc.), Yet Noggin won't show the twenty or so episodes that have been produced to date.

So when will these episodes ever air on Noggin?