White Space Below header

It’s not up to me to decide how many times the images multiply - it depends on the screen size.

I would again recommend uploading an image around 2000px in width and whatever the height you want so we don’t need to use CSS to control the sizing.

Otherwise the issue above is unavoidable.

OK. I was hoping the CSS below would cause the "mobile" header to be full width, but the mobile and desktop headers are controlled by the "site-logo" code.

.site-logo, img.header-image {
    width: 90%; height: 50%;
}
#mobile-header img { width: 100%; height: auto; }
h1.entry-title {
display: none;
}

Add this CSS as well:

.mobile-site-logo img.header-image {
    width: 100%;
}

That worked. Thank you for assistance and patience.

No problem :)