As this Catholic blogger (Mark Shea, apparently) points out, "Reformed Catholicism," is not Catholic, but for the record, it's also not Reformed - it's simply out there. It seems highly sympathetic to the Federal Vision and the CREC, which are, as at least one writer pointed out, not Reformed at all.
Also, this means that maybe I should update my stepping stone illustration to:
TR -> FV -> RfC -> RmC
However, unlike the Catholic commenter above, I do not lump Kepha in as a "Reformed Catholic," I think he's become a traditionalist or s/v Catholic. Nevertheless, I welcome his comments on his own position, if he likes, since his opinions may have changed since we last communicated, and I may be mistaken.
UPDATE: (this is the closest to an attempted explanation that I've seen from the site in response)