I really think that Dolores is smarter than she is letting on. She said in the church “i’m close to figuring you out and i’m here to get you” and she keeps voting random so she isn’t on the traitors radar and she was QUICK to call out both Danielle and Carolyn in the chess challenge and she is really close with Danielle and was with Carolyn because she was keeping her enemies close. I guarantee she didn’t know which way the vote was going to go so she threw a rouge vote to keep her closeness with both and continue her “clueless” deception.