I'm not sure what you are referring to. If you mean the place where his ear folds back a little at the leading edge, that is supposed to look like that, though I suppose you could put the tape on a little more loosely toward the top of the fold so it is not quite as hard a "crease" (always wrap the tape loosely around the ear and then squeeze it together with your hand to make it stick to itself and the ear--that will ensure that you don't get the tape on too tight.)
Look at the back ear in this picture from our tutorial:
When you tape his ear, keep that part folded and tape it that way. Start with your first piece of tape as low down on the post as you can get it; run it up where the ear meets the top of his head; then around to the back of the ear and stick it onto the post, again as low as you can get it. Don't wrap it forward around the post.
That little curl is what helps support the ear and helps the ear to stand upright.