"Best fit" feature doesn't ignore overflow parameters

This video is clearly showing that “best fit” should ignore overflow parameters, but, as you can see on attached gif, it doesn’t work for me. Any ideas?

2013927--130201--example.gif

Looks like a bug to me. I believe what you are saying is correct and what is happening is not intended behaviour.
@phil-Unity do you have any thoughts?

Personally, I’d log it using the unity bug reporter in the editor and see what the team say.