- associated with it. All of them are included in the output,
- unless limited with the --duplicate=N option.
+ associated with it. All of them are included in the output
+ (unless limited with the --duplicate=N option). This may
+ be particularly confusing for **folder:** or **path:**
+ searches in a specified directory, as the messages may
+ have duplicates in other directories that are included in
+ the output, although these files alone would not match the
+ search.