[tbworld]

If I am following the dialog correctly (big if!)

Then, alter and try this:

/* Add to bottom of your additional.css template */
.logo-image {
  margin: 15px 30px;
}

Your margin around your logo was too much.

This is really not the way to control the height of the header, you will have problems if you try to add other elements to it. For now it will get you going.