Oh my word, I do this too, like ALL the time. I will be eating breakfast or whatever, and stand up with my plate so I can rinse it in the kitchen, and I will find myself standing their, staring into my room wondering "why in the world am I in here".
Or when I close the gate to my horse pasture, I will have to go back because for the life of me I can't remember if I closed it or not, I can do this like 3 times, baha.
I would say its normal, tehe