Images count is screwed in Sessions

On importing from a folder in a session, and creating a subfolder in the Capture folder, C1 automatically creates a Session favorites for that folder... all is well. After doing it for a number of folders (each with its own session favorite created by C1), it appears that the total count of images in the session is missing quite a bunch !

The "All images" smart album showed 122 images (absolutely no filter on) but there were 191 images in the session, each and every on of them showing in the individual session favorites.

I had to delete the session favorites and drag/drop the folders inside Capture from the Finder on my Mac to finally see all the images and having the Smart (hum hum) album to show the correct count and give me access to all my images.