I'm on iOS 6, iP5 and iPad Mini.
Related issue I think. The non-iTunes available podcasts (i.e. old radio shows I chucked into my Mac's iTunes, then set to Media Type "Podcasts" in the metadata) are ALL appearing all mixed-up under ONE folder just on my iOS devices (Mac shows them correctly). The artwork also gets all mixed-up.
W T F?? Cannot fix this any way I've tried. So utterly a n n o y i n g !!!
I wanted to import into iTunes a stack of old favourite radio shows into the logical Podcasts section, but seemingly this issue means it's now on hold PERMINENTLY. Why can't Apple finally fix this issue, it's been ongoing now for months, FFS!