Welcome to just a small (and yes, as-annoying-as-you-let-it) aspect of dreaming, which can be looked at like mind-tuning/exercising. I've had tons of these ultra-realistic alternate reality dreams, and even recorded one where I dreaded having to deal with a clogged/clogging shower drain that day, and it was only when I saw it drain fine and tried to match the realities of what I was seeing there in front of me with the "reality" of me seeing that problem develop that I caught the particular dream memory masquerading as a real memory. It is a certainty that there are many more of those that I don't "catch" and just shrug off and confidently adjust my waking mentality as needed.
For a while I let that entwining/entangling reality bother me, as if I were somehow vying for a reality that I needed to control -- until I realized that control comes in the attitude and the ability to *take advantage* of certain things (to learn-benefit from them). So, I turn them to my advantage, in that I am always analyzing the smallest, most nuanced of things (both in understanding how they work and the reasoning/interconnections/consequences of them, which is an ability needed for helpful wisdom), and the dream-figuring/analyzing gives me even more to work with than my actual waking examples. I am no historian needing perfect accuracy (hint: actual historians are never accurate either but more like unwitting propaganda servants), but a deep-growing person needing to see and understand a constantly evolving "big picture". When incorporated and worked through in the right spirit, I have found these dreams to be helpful, not harmful, so I hope my personal experience can help with yours. Cheers.