Clearly your steps to reproduce weren't followed originally and were just perceived to be a minor issue probably with graphic card drivers (not worth spending the time on).
To be honest this isn't the first example I've seen, I have other issues which have obviously been speed read rather than followed which came up with similar (and clearly wrong) conclusions, This isn't just Cakewalks problem, plenty of software companies behave this way as they're always really really busy. Something has to give occasionally.
I agree though, a bug is a bug however minor. It is not a "feature" to be able to see one's screen clearly and correctly.