Weird things sometimes happen. Agency policy regarding self-encounter has been revised 24 times now, mostly because the jokers responsible for updating protocol keep changing the rules. But the cardinal one remains simple enough; BE KIND. Other version of you may be slightly out of joint. 

Do not exchange unnecessary information and if the other you offers instructions, listen carefully.But please, for the love of God, use your judgment.

And finally, pay extra close attention if they show you a transcendental object or give you a book about angels.

That may be the turning point where this whole crazy business suddenly turns to gold.