Recuva is an Undelete tool which will try to salvage deleted file data that is still on disk and hasn't been overwritten yet.
If you delete a file, but don't overwrite it (i.e. not a "secure delete"), then Recuva will usually be able to salvage the file's data, hence it showing the file in an "excellent" state.
On the other hand, if you send a file to the Recycle Bin, the file is not (yet) deleted at all. The file still exists, it is just in the Recycle Bin instead of where it was. Recuva will not show that file because Recuva only deals with deleted files, not files that are in the Recycle Bin. (If you want to restore a file that is in the Recycle Bin, you don't need Recuva; you just need to do into the Recycle Bin and restore the file.)
As per Help-File
NORECYCLE Prevent the use of the recycle bin - files will be permanently deleted. This overrides the Delete to Recycle Bin where possible option on the File Operations / Delete Files page in Preferences.
As said:
Delete ALL FORCE QUIET (Recuva does not show anything, even not with deep scan)
when just the word NORECYCLE is added, (Delete ALL QUIET NORECYCLE FORCE) then the deleted files can be recovered.
Am I mixing things up now?
Could be...
The idea is that files should not be recoverable.
If you want the file to be deleted and not recoverable (even by undelete tools), you need to use the Secure Wipe option (or the argument to the Delete command, if you only want it to affect a specific toolbar button and not all deletes).