Well, I'll just then say that I don't like the new available keywords because it doesn't give you the ability to specify all of the options. So my advice stands.
What would "right,bottom" even mean? Is it "FFF,FFF" or is it "NFF,NFF"? If the PackSize is "F,F", it doesn't matter. But if you use any combination of A or P instead of F, it will change the behavior.
I simply don't like shortcut keywords(that aren't even shorter) that create ambiguity. But whatever... to some people that don't want to learn what the shorthand letters mean, I guess learning the full words may be okay.