Hi again, Christine,
As Michael said, dual donations are quite rare. But they are not "off radar."
At the recent American Transplant Congress meeting in early June, a Poster presentation by A, Sharma & colleagues in the transplant center at Virginia Commonwealth University [Richmond, VA] reported about the 5 dual donors who made both liver and kidney living donations at VCU. All had "thorough evaluations." All "were well educated, successfully employed [people], with previous acts of donation [and] had excellent surgical and psychological outcomes." All were "extremely motivated donors." [Abstract #1047] Please e-mail me if you want more specific info.
Bill