For anyone who find this issue: this is due the logo size you’re using. If you install the theme and you didn’t add the helloCurl logo, the size of the default magento logo will cause this issue. The same could happen if your own logo is of a different size of the helloCurl logo.
Please make your logo the same size of the helloCurl logo, and this issue will not happen. Or change the value of the properties of <h1 id=”logo”>, to fit your needs.