So I just finished rolling and entire dining and living room floor.(rolling seems to work best for me). But as I was reaching my steps and making my last overlap, I looked down and saw my stir stick. I never freakin stirred it! I know I'm an idiot. But will this be okay? Will it effect the finish or duribility in any way? It was my first coat, and it is super thin. Thanks for any help or advice in advance!

The satining agent scatters the light at the surface. It is not part of the resin that makes the finish resistant to wear. After the finish has been walked on for a while the satining agent will polish off a little and get shinier in the traffic pattern.
Since the satining agent is not part of the resin it does not add to resistance from wear. This is why some professionals use gloss for the first coats of finish and then satin for the final coat.