In case this helps anyone else...
I had power up problems with my initially purchased Orion 32 HD. I had it hooked up to a power strip that was turned off after every session - so, the Orion was completely cut off from power after usage.
The unit exhibited repeated problems upon start up, and would typically get stuck at the (default?) 44.1khz setting, rather than re-starting at 48khz as my PT HD sessions - which was also the Orion's last setting before powering off. It couldn't be changed to 48 from the front panel and many re-boots didn't help. Then, randomly, it would allow me to switch to 48khz after wasting a couple hours trying.
Long story short, this unit had to be returned to SW (...this was before SW apparently stopped carrying Antelope). For the replacement Orion 32 HD, I made certain that the unit would ALWAYS stay connected to an active power strip and thus power down into Standby mode when powered off and never be completely cut off.
I haven't had any issues with the replacement unit and it always powers up at the previous rate and exhibits no other strange anomalies. This may be anecdotal, or since resolved as a potential issue through firmware updates, or all do to some unknown reason, but I thought I'd share in case anyone else had similar issues and their warranty period has since expired.