Oh yes. At that age they do all kinds of attitude things. I think it is frustration and desire to control etc. You describe it well though, they just get stuck on repeat.
Plus you have a little one which may just be enhancing her desire to 'get heard'. Having a sibling is changing her too. Upturning her world and she is just old enough now to realise that the world doesn't revolve around her and you can't read her thoughts.

DS wants peanut butter sandwiches everyday. Seriously. I can whip up a culinary delight - he'll take the comfort and safety and familiarity of a peanut butter sandwich. They like the same book. Over and over. Ad nauseum. And if you hide it, they'll find it. Repetition seems so boring to me too, but the kids love it. I used to have to do the exact same goodnight kiss routine with DS or he'd never let me out of the room. Same thing, every night. And mixing it up a bit just made him unhappy.