This Markdown ordered lists table shows how rendered output gets reordered even if the Markdown editor text differs. Moreover, switching to the Rich Text editor will show the same list that the Markdown preview did.
If you use the legacy editor on desktop, a workaround for this issue could be to enable and use only the Automatically correct list numbering when editing lists option of the Enhancement plugin. It reorders lists for both Markdown and Rich Text editors, even after moving lines up/down the list as described here: [Android Toolbar Feature Request] Add ability to move line up/down - #6 by Steph
While the beta editor reorders numbered lists, reordering a list after moving lines up/down requires indenting then de-indenting the line for:
- The first item in any ordered list (if you want to reset the list to start at
1.) - Any ordered list item