personally Apple may think its to separate user data and OS data, but they could have named them differently. I already have two "Macintosh HD's" at certain times on Mojave, which ironically is a bug.
So, now its actually 'on purpose" ?
Just a simple knowledge base on instructing users to keep a second partition for data, or a screen during upgrading should of been sufficient.. .
- If they flick it on, then it would create a data partition..
- With if "Off" it would remain one.
Boot to internet recovery (NOT to "the recovery partition"):
"command-OPTION-R" at boot.
Then... go to disk utility.
Go to the view menu and choose "Show all devices".
NOW erase the internal drive (make sure you choose the topmost line that represents the physical drive)
Then open the OS installer and try a new, fresh install.
I thoght disk utility shows BOOTCAMP partition. it does display on desktop on OS X doesn't it ? If you erase the top most, not the vlume, wouldn't that kill everything ?