Sorry it hasn't worked out better :-(. Next time maybe try to find the thin stuff? I know they were out of the packaged kind. Lesson learned, though, I won't use that heavy stuff now either!
I think what I need to do is try it on a lower iron heat with no steam. Looks like I'm going to need a big white muslin bow with some embriodery on the tails to HIDE THE WARPAGE.