I’ve been using the Mk2 forever, and found that with my Rose RS130 streamer I had to invert the channels with DSD. I was just playing a DSF I’ve played many times before (the famous Reiner Scheherazade), and started thinking to myself “something ain’t right!” Lo and behold I suddenly had to switch the DSD channels back to Normal on my I2S input! 
No change to anything. Certainly no change to DS FW. No change to RS130 FW or SW. No change to JPlay. Nothing! I can’t figure it. I even used the PS Audio set up disk (DSF on my NAS) to check and sure enough the Left channel is Left when now the I2S DSD channel are set to Normal. Makes no sense. I wish Ted were here.
…uhh…where’s Ted?
Ted seems no longer a part of PS Audio or this forum.
Yep, I know. I can contact him directly, I guess, but I wasn’t sure if anyone else had this happen.