You might want to test your filters before you use them extensively.
Run an advanced search on the folder using the same criteria you used for your filter.
If your advanced search returns the content you expected, you can apply the filter to the appropriate folder, confident that the filter will allow the proper documents into the folder.
Add the filters to subfolders and perform a smart sort to sort the content into the subfolders according to the filters.
If the subfolders contain the content you expected, the filters work correctly.