Terez, who has seen the notes, confirms that RJ had differing ideas on Cadsuane's strength. That they didn't decide on one and stick to it is unfortunate, though.

As for Liandrin... there's actually evidence, which I used to dismiss as early-book-itis. She rudely interrupts Moiraine and Anaiya in Fal Dara, which she simply couldn't have done if she was weaker than both. Now, in the level between them, her behavior is perfectly acceptable.