Banner Ads might be transferred to rectangle ads?

I have no idea if this is a problem but I don’t want to test it and look like a fool with a banner ad in a rectangle.

Here’s what happened, I made a new ad for my game, and when I woke up, I checked to see if it had been approved, but noticed this:

Will it affect how my ad looks? As you can see my previous banner ads didn’t do that.