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Meaning does each one have a separate counter? Can you be for example *both* honest and deceptive? Passionate and Stoic? Or does increasing Honest automatically decrease Deceptive and vice versa?
This question / problem has been solved by PLASMA97image
The disposition counters are independent from each other, but you are unlikely to get high ranks in both deception and honesty without gaming the system. Even if you do, NPCs will only react to one disposition and not both.

Unless you are a Priest or Paladin, dispositions in the first game only matter for roleplaying. Deadfire is slightly better about rewarding/punishing you for certain dispositions, but they are still mostly flavor.