The problem is that you're stuck with the version of Swype that's on the phone, since it's native. Swype won't let you install new versions...(unless I'm unaware of a method).
The beta version of Swype that's out right now doesn't jump around like that, so you don't hit that button accidentally. If you can figure out a way to install the newer version, you'll be a much happier texter. And the line you draw through the letters is yellow! haha
But yeah, hitting the attachments button bugged the hell out of me.