I'll see what I can do! The intent is that "fate, steel, heart, bone" are the four categories, each of which has a single corresponding table. It's actually pretty funny that the current version never says that outright.
Yeah! I've uploaded a new version of SCARS with some rewording and layout alterations - such as letting the Fate Steel [now Arms] Heart and Bones titles sit asymmetrically, so they're more clearly attached to their tables than to each other. Let me know if the text is more comprehensible and if there's anything else I should look at!