Photos slideshow changes order of photos...SOLVED

Been struggling to get a slideshow to maintain the order I created in an album. I'd rearrange photos in an album, create a slideshow with the album, and the slideshow would be in a different order -- I suspect chronological, but not sure because they are all actually old photos and the dates are just when uploaded. Call with tech support finally got to a solution. They need to still fix this, but here's how we got it figured out.

1. Open your Album, arrange as you want
2. Select all photos (cmd A)
3. With photos selected, right click, then use "Create-->Slideshow-->Photos"

The slideshow you create will be in the order of your album.

The bold parts - selecting all, THEN accessing the menu by right-clicking is the key. Every other way to create a slideshow didn't do it.

Also - this applies if you want to create a slideshow using the themes and music and timing they have. Not the quickie Play Slideshow or Memory video features

Did all this using Sequoia 15.0