No, it just doesn't make sense. "Interfere" is something some another PC rolls against you, it's not something you roll. So how could you add instinct to your roll?
Also, I think instinct actually is supposed to be generally negative. Compare these two stat lines for companions:
• Ferocity +2, Cunning +1, 1 Armor, Instinct +1
• Ferocity +3, Cunning +1, 1 Armor, Instinct +2
High instinct indicates that your companion is less tamed, more difficult to control. It's just like the Driver's cars in Apocalypse World (when someone interferes with you, they add your car's Weakness to their roll).
At least, if that's not the intention, then other stuff is wrong instead. In any case, something's wrong! Probably just a typographical error, but still.