So just to clarify, we add doubt to a guest's Dossier the second time we play a motive card, provided it's not the FIRST guest to get a motive card?
For example, if I play a motive card on the Cultist during the evening shift, he gets motive, but when I play one on the Medium during the graveyard shift, she gets motive AND doubt?
Correct, every time after the FIRST draw. Second, third, fourth, etc all add Doubt to anyone attached to that Motive card. So, for example:
1. Draw a Motive against a Cultist, Cultist gains +1 Motive
2. Draw the same Motive against the Medium, Medium gains +1 Motive, BOTH gain +1 Doubt
And "KA" is a police acronym for "Known Associates." If you want to keep tabs on who is consorting with who.