Nothing to see here. Move along.
Rules? I gotta read RULES‽
Is it possible to know which versions/print date include these errata corrections/clarifications?
I think plastic clamshells would be a hint at least. I have clamshell Dwarrowdelf, but my one Ring-maker pack is cardboard. The clamshell versions of the first three would have the errata, and if not already the case, easy-mode updates (markers on cards to remove).