Header logo shows up twice?

My header logo for my site is showing up twice - looks like once with a margin and once without - so it looks like they're overlapped at the top. (I want it without a margin.)

Please see https://www.chacha-vintage.com/shop.

I'm sure this can be fixed in my stylesheet somewhere? I have tried different fixes from searching through the forum, but nothing has worked yet.

Thanks so much for your help!

Okay, now the non-margin header logo is gone, so just one is showing. However, I still want to get rid of the margin on that. What part of the stylesheet is defining that?

I will be so very happy when someone writes up a detailed explanation of all the elements of the stylesheet! For now, it's almost all trial-and-error, which translates to SLOW!

Thanks again!

I guess I'll just keep posting to my own thread!

So I figured out what was happening... I had set a margin to all of the images using "a img {..."

I guess I need to figure out how to set up different image classes so I can exclude things like my header image and my buttons when I want to apply things like borders or margins universally to all my product photos?