Hi @Chris_Perryman and thanks for reaching out!
We’re currently transitioning between the old “semi colon” and new “Tab+N” shortcut to create sections; looks like the sections copied /pasted were built with the old system (semi colon), which could explain why you were running into trouble.
Regarding your second question about Section creation: the new section will always show up at the bottom of the section you’re focused on. Essentially you can think of Sections as containers, the new section will always show up right below the focused containee!
Hope this helps to clear things up, but if you have any follow-up questions or comments, please let me know!