Gracie only does this with certain blankets. I have a couple blankets that I took out of their storage bags in my bedroom closet. If I do not latch the closet door she will open the door, drag her favorite blanket out and arrange it just as she likes it. Eventually she will lay down and take a nap on it.
She has her own blanket on the bed which she rearranges occasionally but not every night.
It does make you wonder what they think they are accomplishing with all the activity.