His information is very misleading/plain wrong.
2.39 isn't anamorphic, it's cinemascope. It can be shot with an anamorphic lens and desqueezed, or it can simply be cropped from a high-res sensor. Both result in the same final aspect ratio, but with very different looks.
He's only confusing matters by labeling it anamorphic, which has nothing to do with aspect ratio, and all to do with pixel size/ratio.
And the correct name for 1.85 is FLAT.