Imports appear above parent folder

It would be helpful if you showed us a screen capture of what you see. Instructions to show us screen captures.

It sounds like you might have the Capitalization Error. See https://www.lightroomqueen.com/capitalization-catalog-error/ for a solution

Commonly this circumstance happens where the computer user name forms part of the file path, and this username gets re-spelled for case in a new computer - but another part of the file path may have meanwhile got re-spelled (just for case, otherwise still using the same letters).

Say (to simplify) several photos folders were imported at, and are now remembered by the Catalog as being inside, C:\pictures\2025 - and this “2025” is displayed: these folders are shown nested inside it.

But during the adoption of a new disk (say), that folder became “C:\Pictures\2025” - with the same contents. Windows does not distinguish this from “C:\pictures\2025”, so the same contents are considered to be still online, and the same results may seem to happen with Show in Explorer.

The only “2025” folder displaye din Folders panel though (the one from before), lacks a capital P in its parent folder nam. Newly added folders within “C:\Pictures\2025” are seen to have the capital P in their parent folder’s name. So the Catalog does not consider that this new 2025 matches up to the previously added 2025, even though Windows may consider those two to be the same location.

YOu could try using “Show Parent Folder” onto one of the image folders which is failing to move into the right nesting, but more likely you will need to do some fodler re-naming in the OS (outside of LrC) and then re-browse some folder locations inside the Catalog, to get its remembered image paths / the actual file-system paths into full and consistent alignment.

Windows Exlporer wouldn’t allow you to (e.g.) rename “Pictures” to “pictures” in one step. But you can do this in two steps, via an intermediate different name.