No I hadn't realized that SCAG had errata'd that. Not happy
Niara, you are correct that in many cases Kelemvor assigned them but while waiting for judgement you risked being snatched by devils or talking into signing a contract
Are you sure you aren't talking about the false with renouncing the gods? I thought renouncement made you false - so walling - but a general lack of devotion could get you judged to be wallable.
I always imagined it like this:
Faithless - lip service, lack of devotion, Pathfinder style atheism
False - violation of precepts of deity, denouncing deity, denouncing of all the gods