I plan to report these to Oppo.
The DTS-ES Discreet testing I did was actually with a CD source (the only source of it I have). The Dolby Digital EX was from DVD sources. I'm uncertain if I have any source for DTS-ES Matrix, so I haven't tested that. Using the DTS-HD MA 6.1 Blu-ray track was only to verify that playback being limited to 5.1 channels when the BDP-103 is performing bitstream decoding was only occurring with DTS-ES and DD EX sources, not with other 6.1 or 7.1 channel sources. The DTS-HD MA 6.1 does work correctly.