Trying to recover notes from Time Machine results in "notes can't be modifies....."

Once again a “note” in my my Notes app has mysteriously disappeared. I did not delete it, it just randomly poofed. I had this happen once before that I am aware of, ironically the same subject matter as what disappeared recently.

I've googled galore for solutions.

I've tried 2 things:

1) I went to Time machine, to Applications > Notes > went back to the last couple back ups (March & January) > hit restore but nothing changed plus I got the msg “Notes can’t be modified…..”

2)Went to Finder > Go > Go to folder > Libray/Containers/com.apple.notes/Data/Library/Notes/ > NotesV4.storedata….copied to all 6 files to my desk top, added .html and opened….out of 6 files I found one measly paragraph regarding the notes that I am looking for (proving to me I hadn’t lost my mind!! just my notes!) however I can’t see the rest of the missing notes amongst the cryptic hieroglyphics.