Hi!
Since your logo is bigger you’d need to set the menus padding to right size. In style.css on line 1804 set this up:
nav > ul {
list-style: none;
margin: 0;
float: right;
position: relative;
padding-top: 20px;
}
And we don’t see the element that is overlapping the slider. Can you point out what element are you referring to? If you think about header spacer, it is beneath the header, so that the slider wouldn’t go under the header (so that it’s fully visible).