This is the most useful thing anyone has sent me about this game, thank you.
The seal ambiguity is a real one, although the uniqueness of a case is machine-proven before it ships, what that proves is that no other repair explains the trace. It does not prove that the six class names carry boundaries clear enough to pick between, and your two readings of that swap are both defensible from the listing. Explicit definitions for the six, and for First Harm, are going in before the Steam build on Wednesday.
The tutorial is even worse than you found: any key advances it, and the back key skips the whole thing. That is why you could not go back. A back step and a deliberate skip are going in too, along with the machine showing what can be clicked, which I suspect is half of why the seal felt unclear.
Thanks again, great feedback.