[Maciej Sarna]

Hi! This too late for sure, but maybe for some people still strugling with this problem might be useful.

Did You try “matte choker” after keying? This should fix the problem and cut theese edges out. I,ve done it many times with badly lighted blue/green screen and the results were satisfactory (relative). O! and I’m using the bild in AE filter “linear color key” insted of “keylight” – don’t know which is better – writing this just to note.