Ok, went to bed at 5:30am this morning, and the MicroHD was parked on MEtv 1, and the IR sensor was covered with black electrical tape, and it was left turned on as normal, NO standby is set.
Just got out to the living room at 2:30pm after waking up, and getting ready for my day (night).
Flipped the HDMI switch over to the MicroHD, and it was tuned to MEtv 2! "The Lucy Show"...
So, it switched by itself sometime between 5:30am and 2:30pm. I do have a weekly Sunday timer set to MEtv 1 from 6:30am - 8am to catch the "Laurel and Hardy" show. But that's the only timer set between 6am-2:30pm. I'm betting it switched to Metv 2 after the timer event ended at 8am, instead of coming back (staying on) to MEtv 1.