Anyone here familiar with the stages of Alzheimer's?

Specifically stage six where hallucinations, paranoia, wandering, accusing others of stealing and 180 degree change in sleep patterns takes place?

I was wondering...Alzheimer's hallmarks are memory and confusion. The initial stages seem to be mild, then moderate, then severe with both memory and confusion. Makes sense. And likely, everyone with Alzheimer's experiences those symptoms.

But stage six is very different with the add ons of lots of other issues like the hallucinations, paranoia, wandering, alternate sleep cycles. My mother, right now, is in stage 5. No issues at all from the next level yet.

If I were to ask if all Alzheimer's patients have memory and confusion issues, the answer would be a resounding yes. But is it the same for the latter stages? Do ALL Alzheimer's patients succumb to ALL of the symptoms of stage six? Could she wander but never get anything else..ever? Or is she going to eventually have all of the symptoms?

...Just trying to prepare for the wonderful future ahead!

Thanks