I have a stop motion animation that is on 4s and 5s and some of the frames need to have dust and other things removed. I assumed that if I applied a clone stamp to frame of 1 of my 4 frame image/layer, it would span the length of those 4 frames. I watched some tutorials and that appears to be the case since they had to motion track the clone. Since there is no movement on these frames, I don't think I would need to animate the clone, however when I apply the clone stamp to a layer, it is only applied to that frame and I need to add it to the frames of that layer.
Check the options in the clone tool panel.
You have set the duration to "Current Frame". As Rick said, adjust your settings on the clone panel/ the paint keyframes settings post facto.