Easy question with a simple answer.
Yup.
Pretty much anything they do is considered 'typical' unfortunately. Don't be surprised by too much (I sound so defeatist don't I ?? I don't mean to be) because even though the Dementia's have their 'routine' symptoms, because everybody is an individual and unique their specific symptoms will vary. Martha's Mum talked to a Monkey, my ex-charge loved the picture of a prominent female politician on the front of a newspaper insert ...
Go figure ..

don't try and understand it, just accept it.
Your ultimate goal is to keep your charge SAFE, CLEAN, DRY and FED. Anything else is secondary really and a bonus (if it's good).
Hugs .. hang in there .. sorry it's such a useless reply .. :-(