instanced merits marked to remove properly

Before in the staff section:
sheet/set xxx/merit=library:5/Occult
sheet/set xxx/merit=!library:4
+xp/spend xxx=10:Library (Occult) 4 > 5

Now it will come up:
sheet/set xxx/merit=library:5/Occult
sheet/set xxx/merit=!library:4/Occult
+xp/spend xxx=10:Library (Occult) 4 > 5

The middle command will prompt the staffer to remove the correct merit.
This is needed due to a flaw in the underlying stat system.