1) ahh, yes that did it. my bad. you should see the bounding box shape that just appeared lol !
2) You are right of course, when I think about it. My usage will not be rotating them anyway, so I will only use the 2 corners
one small thing. If I have a bounding box, and then accidentally click the set points again, without warning, I lose the entire bounding box already there ? You might want to pop up a dialog ..