A few times I’ve come across Jumbles with more than one possible solution. Usually the alternate (“incorrect”) solution is something really obscure. One example that pops up from time to time is DEILY: the correct answer is assumed to be YIELD, but YLIDEis also a real word. A few months ago there was a somewhat more glaring example: CEHILS. The answer was supposed to be CHISEL, but IMO, CHILES (as in chile peppers) is equally valid.