Does Ninth Circuit Mortgage Interest Decision Create Special Rights?

It is kind of ironic for the Ninth Circuit, which played such a big role in advancing marriage equality, to be issuing a decision that discourages registered  domestic partners from marrying.  That is an effect of the decision in the case Bruce Voss and Charles Sophy vs IRS, although I imagine it is an unintended consequence.  It almost seems as if the Ninth Circuit has instituted that conservative trope - special rights for homosexuals - with this decision.  Closer analysis would show it wo...