Welcome to DV!

Joe sounds like a dream guide (DG).
His main reference for himself may be in that time period or perhaps that was simply the best place to teach you or get you to remember which it seems to have done nicely. DGs usually try to teach you something and telling you to remember is very common.
If you read around in DV you'll see it is not that uncommon and some people have had experiences a lot like yours. I'd keep detailed records on everything, not only does this help you remember it also helps you to recall such events later.