DSD Playback Mode

When this setting on the RIVO + is set to “DSD direct” my Gustard R30 DAC goes to PCM mode even as the file is DSD…
When however this setting is set to “DSD over PCM (DoP)” my DAC goes to DSD mode. (the R30 has DSD direct)
This seems exactly the other way round as it should be.
BTW connection is over I2S