All my animations in scenes will not run

In Sketch I created from my model about 12 or so scenes, to do an animation, but when I run the animation it on plays a few
of them.
i.e. it plays say 1 to 5 jumps to 12 and then starts again with the same process, what am I doing WRONG !!!.

Open and expand the Scenes manager.
There, confirm the Include in animation checkbox is checked for each scene.

Thank You for your help, don’t go away I might need you later on who knows.

Brian UK.