For the Biest domain there is mention of Regional Traits not stacking with Kingdom Traits unless you have a Regional Affinity.
What does this mean? Do similar traits normally stack or do you just use the highest instance of it?
Does this mean for example that if a feline kingdom took Stealth: Stealth 2 and also took the regional trait Woodland Stealth: Stealth 1 that they wouldn't benefit? Would these normally stack to a stealth 3 but require the regional forest affinity trait to do so?