I have flipped houses in the past and redone hardwoods floors a few times. Still a novice. I usually use a mohair roller to apply it. It seems to work the best for me. Anyway. I just did a large dining room and living room, using minwax super fast drying gloss poly. As I was making my last pass with the roller, I saw my stir stick and realized I never freakin stirred it! Will this be okay or effect the finish in anyway. The coat is super thin. Thanks for any advice or help in advance!

The satining agent will settle out over time. If you are on the final coat and it comes out too shiny you will know why. If it is the second to last coat, you can pour off the top, then stir, and mix some of the satining agent in to approximate the satin level that you like.

My understanding is that gloss oil based polyurethanes don't require stirring. Semi gloss and Satins do because they contain flattening agents which account for the Semi or Satin finish. Gloss poly does not contain flattening agents there stirring is not necessary.