I've always pressed my binding in half - and then sometimes had "issues" with it - but it never dawned on me just to NOT DO THAT - LOL!!!
Since I'm rather new to quilting, I was use to doing binding without the double thickness- so then the pressed line was not an issue, but there were other problems doing that on the quilt. Then I figured out I was suppose to sew it double, and that worked better but then the ironed fold was sometimes not to my liking.
I've got a table runner waiting for a binding, now I'm excited to try it without ironing and see how that goes - and that says a lot because I NEVER look forward to doing the binding.