I’m using Dragonsong unique bow which should grant +2 to all fire skills.
When I equip it, it really shows +2 points to all fire skills (in my case Cinder strike, Decoy, Hail of Arrows)
I assign one skill in Cinder strike and the plus points dissapear, I cannot assign them to any other skills, also only one skillpoint can be assigned and it do not show anywhere that there are plus skillpointss assigned.
EDIT: looks like a visual bug not showing the possible +2 skillpoints or where they are assigned, but I can assign the points when clicking on tree