I would argue against the concept that people are confused and who know's what else in the afterlife like the popular belief when explaining focus's...

My main reasoning is due to the fact that a good and true medium can always contact the deceased loved one. There is never a strange confused report instead of real data.

Additionally some like to say you have a lower self and higher self and that the higher self is not confused even if the lower self is. I say HOGWASH. That concept merely makes it all more confusing and it's a more complex solution which is not even fully verifiable.

It's way more likely that you die and bam, you know everything you forgot and you now become YOU 2.0™.

I see this as the simplest answer to the question and leaves no room for confused spirits in the afterlife.