When using multiple equipment sets only the Default Set is applied. Activating any other set is ignored.
Data: PFCR, APG, Bestiary
PC: Attached
Using troublesoothing sheet the following results were obtained.
Default set has longsword, chain shirt -> AC:19 (BASE +1 SIZE, +3 STAT, +4 Chain Shirt, +1 Light Shield)
No Shield set has longsword, chain shirt, with no shield equipped or carried -> AC:19 (BASE +1 SIZE, +3 STAT, +4 Chain Shirt, +1 Light Shield)
The copy of the character used for output was not inheriting the equip set choice.