Do I need to reapply my cat's Advantage?

I just adopted a stray cat out of my yard. I took her to the vet and found out she has ear mites, roundworms, and fleas. My vet put Advantage Multi on her to treat, and gave me a tube to put on my resident cat to make she doesn't get anything from the newbie. I've never done it before, and when I put it on, I got down to the skin like you're supposed to, but some of it dripped down her fur. I wiped that off with a dry tissue, but then she licked the spot where it had run down her. Obviously, it tasted bad, and I haven't seen her lick the area anymore. Should I apply another dose, or did she get enough? (I don't know how much actually stayed on her and how much ran off.)