This sure seems like a bug, let me paint the scene:
We have an object, let's say a sprite:
And then we have a panel object with a hotspot conveniently set to center:
So we go ahead and place the panel to the same position as our object:
So far so good:
Now we think - hey, it has a centre hotspot, so all we need to do is to resize it and set an angle and it will cover our object nicely:
But what happens is this:
Which is really quite bad. Is it bug, and if so, is it possible to fix it? That would REALLY help for certain things (in this case we were trying to do a bit of automated fake Ambient Occlusion).