Ownership of Charles Bauer’s residential mortgage bounced from JPMorgan (which filed and voluntarily dismissed two foreclosure cases) to U.S. Bank (which got hit with an order dismissing its foreclosure complaint with prejudice based on the one-refiling rule) and then Carisbrook Asset Holding Trust (which allegedly hired Roundpoint Mortgage Servicing to try to collect on the unenforceable debt).But when Bauer sued …