Logo in header will not go full size

I’ve never had this problem until the latest upgrade of Vantage. Basically, I have the header formatted using Layout Builder in the Header widget. The problem is that even set at full size, the logo that I have in the middle cell is not 319 x 109 (full size). I’ve tweaked the padding of the cell and the entire row and the logo is still scrunched.

This is what I have in Custom CSS:

header#masthead .hgroup .logo { display: none; }
header#masthead .hgroup #header-sidebar {
left: 0;
right: auto;
float: center;
padding-top: 0;
padding-bottom: 0;
position: static;
width: 100%;
}
header#masthead .hgroup {
padding-top: 0;
padding-bottom: 0;
}
header#masthead .hgroup #header-sidebar aside.widget {
  width: 100%;
}
/* Vantage Hide the Site Title */
header#masthead .hgroup h1 {
display: none;
}

Here’s the URL: http://theavaloncompany.com/dev2. The logo should be at least twice that size. What am I doing wrong?