System backup defaults to Disk 0 (but boot drive is on Disk 2)
I left a comment in Products Support on May 4 "System backup defaults to Disk 0 (but boot drive is on Disk 2)".
Although only a day, no solution, and this appears to be a bug which AOMEI may want to review and fix.
Comments
Again, I can't answer your problem fully, but I'm not sure this is really a bug with Aomei or about something with how your system is set up. I have Backupper on 2 Win 10, 64 bit PC's. My OS is on Disk 0. On my wife's computer, the OS is on Disk 1. I plugged in the SATA ports that way some time ago. I didn't notice it until much, much later so I just left it that way as everything was working fine. I am running a SYSTEM backup on each PC with Aomei and the OS disk was detected on both PC's by Aomei during the setup without me doing anything special other than specifying I wanted to do a SYSTEM backup. If you've been trying to do a SYSTEM backup, try doing a DISK backup.
So Aomei is not defaulting to Disk 0 for me when asking for a SYSTEM backup. On the snapshot you posted Disk 0 says it is active and contains your system. C on Disk 1 has the boot info but you want to image Disk 2??? This might be your problem. Others with more Windows knowledge than I have (possibly on a Microsoft forum website) can analyze how your system is set to work. Good luck with this. Sorry I can't be of any more help.