QUOTE
A character gains the advantages of all martial arts styles she knows; should they overlap, these dice modifiers stack. The maximum number of dice that can be added to or subtracted from a character’s dice pool from martial art modifiers is equal to the rating of the relevant Combat skill.
Let's say you have a character who knows the following styles and advantages:
Aikido: +1 die for Full Dodge
Boxing: +2 on Defense Tests against unarmed attacks (took the advantage twice)
Capoeira: +1 die on melee dodge
He has Unarmed Combat rating 3 and Dodge rating 2.
He is attacked by a street sam who is using unarmed combat, and he is also using unarmed combat.
If the character defends with a Full Dodge and rolls Dodge + Dodge + Reaction, his bonus from advantages is +1 from Aikido, +2 from boxing, and +1 from Capoeira, for a total of +4. Since Dodge is the obvious combat skill being used, which has a rating of 2, his bonus from advantages is capped at +2.
If the character defends with a Full Dodge and rolls Unarmed Combat + Dodge + Reaction, his bonus from advantages is +1 from Aikido, +2 from boxing, and +1 from Capoeira, again for a total of +4. However, since he rolled both his melee combat skill and Dodge, which skill determines the cap? Is his cap 3 or 2?