Most cookies bake a little bit uneven around the edges, especially if the dough is soft and not refrigerated before baking. To get your cookies perfectly round, as soon as you remove them from the oven, use anything round like a biscuit cutter/cup/mug, etc. to scoot the cookies around within the circle.  Be gentle so you don’t break the soft cookie but you have to be quick and do it as soon as the cookie comes out of the oven, before the edges set.