Can anyone explain this?

This is the strangest RAID case I've ever seen. I'm too lazy to type it out a second time, so if you want a good head scratcher mystery read, enjoy the blog post here: https://www.data-medics.com/data-recove ... very-case/

The case is solved and data recovered, but I still have no clue how an array could end up in this situation. It doesn't even seem possible. Does anyone have an idea how this could have happened? Just when you think you've seen it all.