Hmmm, unfortunately, I cannot tell what is going on in y'er coding. I'm not particularly code-savvy, but, I do not think ye can do both. Y'er scrolling requires a non-transparent background to scroll.
But, I wonder if ye can make y'er scrolling texture somewhat transparent instead of y'er preset's body.
Sorry I couldn't be of more help. Good luck with y'er preset floof!