I noticed this bubble. But it's not like any bubble I've ever had.

I called TireRack as these tires are less than 2 years old. Pretty much they told me buy a new tire, have the old one inspected, if it wasn't from impact they will credit me.

The thing is this isn't a normal bubble. The bubble is almost a perfect rectangle with straight sides.

Basically I want a second opinion. What should I do? Does this look like a serious bubble or just the way the tire was manufactured?