Using Faces function creating a Collection of a specific face for slideshow or book

.....but I cannot move these images to the filmstrip or directly into  a Collection Folder.  Any suggestions?

If you select all the images in the "Confirmed" panel they will automatically all be selected in the Filmstrip, but depending on the spacing of the images throughout the selected source, it may be that only the first selected image will be visible in the Filmstrip. However, all the rest will also be selected, so at that point you can drag the first selected image from the Filmstrip to the Collection and all the other selected photos will go along as well (or create the Collection in the Collections Panel while choosing to "Include Selected Photos").

TBMK The "Faces function" tags and creates a 'Person' keyword for named faces. eg. Bill Smith.

Find a Person Keyword in the Keyword List Panel, and click the arrow at the end of the keyword to view photos of that person.

Next: Select all the photos (of Bill Smith), [Ctrl + A ]

Click the Collection header [+] to create a Collection- check the option to [include selected photos]

   [Create].