It does look to me, too, that you are very close. Play around with the shaping a little. I prefer my tail to be down in front as well, sometimes I have to cut and re-seal it, though after the bow is formed to make it as short as I like. Saying the back ribbon needs to be straight means to have them straight horizontally (and overlapping, but not bunched up). I use a pin to hold mine in place - I've found it can shift a little even when using a clip to hold it. HTH and don't give up - you're super close!