Wavy lines are rendered as a yellow highlight on the iPad.
Sean - In testing, I have seen similar glitches as this. Can you explain the situation a little more? Were the highlights made on your computer or iPad? Do they show up properly on the other device?
Sean - If other styles are working, I would bring this up again in a couple of weeks. It may be a bug with that particular style.
I noticed the same thing. Had several custom markups from PC which show up as yellow highlights on iPad.