How do i delete a cover photo from my Facebook page?

[purselect]

I created a new group...I was adding 2 pics...of 2 different people.
What I didn't realize is that there in the place where the cover photo should go and I can't delete them so I can put an actual cover photo there.

Anyone have any idea what I can do to fix this?

So what I have is 2 huge photos on the upper left side...where the cover photo should be. How do I delete these? I've read tons of stuff, but doesn't tell me how to delete it.
I went to the timelines like it suggested and click on my cover photo....that just deletes my cover photo for my original FB page I made....this is a group I just created.

Any ideas? I know this is confusing and I've been at this for hours...help!