Hello,
Change the z-inded value below to 1 instead of 2
Template.CSS - Line 994
#s5_pos_custom_2 {
background: none repeat scroll 0 0 #f1f0f0;
box-shadow: 4px 4px rgba(0, 0, 0, 0.15);
left: 0;
margin-left: 22px;
margin-top: 22px;
padding: 10px 10px 0;
position: absolute;
top: 0;
width: 240px;
z-index: 2;
}