Ringworm can be resistive to some meds. There are different kinds of ringworm not just one strand. You really should switch to lamisil and you should do the lime sulfur dips. If you have found another spot you may have to step it up a notch as far as treatment of your kitty. Dip in lime sulfur every three days, treat with lamisil and isolate. And of course clean like crazy. I don't mean to sound aggressive or tough but ringworm is hard to get rid of and you have to be more aggressive than it. Good luck, you are in my thoughts!!