Hartshorn Salve not healing Blunt Trauma

[TheRealYonish]

I ended up with 14 Blunt Trauma, it happens.
I applied Hartshorn Salve on it, got Hartshorn-Salved at 52% on the wound.
However, over time, instead of healing the wound (like it's happening with another wound I put Hartshorn Salve on) the Blunt Trauma does not disappear, but instead a part of the Hartshorn-Salved wound moves to a new wound, that is not Salved - it even grew, as I now have 9 Blunt Trauma that is salved and 6 that is not. I assume over time all of the Salved wound will move to the other one, which begs the question - why can I even use Hartshorn Salve on Blunt Trauma if it does nothing, and even makes it worse?
Update: I am now certain it does do just that as I am now on 7 Salved and 7 Unsalved Blunt Trauma - I'm not sure where the extra point disappeared into, maybe it's a rounding thing.
Update 2: After a night the amount of Blunt Trauma is only 8, and it's unsalved - I am generally very confused about what exactly happened - did it actually heal the last 6 Salved points and left the 8 unsalved points?