Hello,
I’ve just finished upgrading my last mercenary to rank X - so they are now all ranked X.
Unfortunately when I go the the bartering npc it still shows that my bartering upgrades are 4/8.
What am I missing? I’d like to upgrade it to 8/8.
Update:
If you are as stupid as I am, here is the solution:
I didn’t click on all my mercenaries’ rewards because I didn’t realise I could scroll down on the rewards screen!