stephencottontail on "Sidebars are driving me crazy"

Yes, but it would require some major surgery, a bit beyond the scope of this forum. You might wish to hire some assistance at http://jobs.wordpress.net/.

Another option would be to keep the widget the way it is on mobile and only switch to the floating version on larger screens using media queries:

@media screen and (min-width: 600px) {
  #text-15 {
    position: fixed;
    top: 25%;
    right: 0;
    z-index: 20;
  }
}

This code tells the browser that when the window is 600 pixels wide or larger, set the text widget to a fixed position, floating above the rest of the site. When the browser is 599 pixels wide or smaller, the widget will stay where it was before.