You have me trying to decipher this and visualize your drive flow chart... And I’m having trouble... lol
It probably seems wanky because in Disk Management, the NVME M.2 Boot Drive “C:” that the computer was purchased with, is “Disk 2”.
Looking at it in Disk Management’s “Disk Panes”, I have:
Disk 0 Basic | SATA SSD [480 GB Nominal], reports as 4 partitions: System Reserved (E), 350 MB NTFS, Basic Data Partition; Data (F:), 464.70 GB NTFS (Basic Data Partition); a 100 MB EFI System Partition; and 513 MB Unallocated.
(This is the “data” SSD from the old Win 10 Pro machine.)
Disk 1 Basic | (SATA SSD [480 GB nominal, reports as 447.12 GB Unallocated
(This is the brand new SSD.)
Disk 2 Basic | (NVME 240 GB boot drive) consisting of 3 partitions: A 100 MB EFI System Partition; (C:) (Boot, Page File, Crash Dump, Basic Data Partition); and an 807 MB Recovery Partition
(This is the NVME SSD that came with the new Win 11 Pro machine, with the OS installed on this drive and running fine.) (Still is.)
CD-ROM 0 | DVD (D:)
(The above is with no external USB drives attached.)