Try adjusting the top margin of your logo declaration:

#logo {
display:none;
margin: 40px 0 0 350px;
}

You might also want to make the following adjustments by deleting the parts in red and adding the part in green:

#logo, .centerBoxContents, .specialsListBoxContents, .categoryListBoxContents, .centerBoxContentsAlsoPurch, .attribImg {
float: left;
}

#logo {
text-align: center;
display:none;
margin: 40px 0 0 350px;
}