If you're using 19 frames of animations, you should change the size of your spritesheet to work with 19 frames.
Consider that each spritesheet has 3 basic animation frames, arranged in 4 columns, for a total of 12 sprites per row. If you're using 19 frames of animations you need to increase the sprite size to 19x4 frames of animations. So in the end you should have a spritesheet with 72 sprites per row (which is a bit complex to manage).
The clipping problem is created precisely because you are trying to use 19 frames of animation in a spritesheet that contains only 8.
I hope I explained myself well :)