The Bishop

Which side is official Wounded/Injured? The heartbeat side for wounded is very unintuitive, cause the Durability symbol on the Unit Stat card is also a heartbeat. Not choosing the same symbol for this is really confusing.

If he spend 4 force (3+1) can he change 4 hits to fails? The intention is obvious no, just 3, but is there a clarification or a rule that explains why not.