Marketpress Grid "Add to Cart" button

I have installed the Marketpress grid plugin, and made some "minor" changes to the css so the boxes were a little longer and spaced further apart. Now the uppermost left box has a weird placement of the "Add to Cart" button. It is to the right of the price with no spacing. I have tried removing and replacing this product but it continues to be a problem with only this box. I am using the Photocrati theme.

Here is the css:

#content .grid div.mp_product_meta{
clear:both;
background:none;
padding:0;
margin-right:0;
}
#content .grid h2.mp_product_name {
padding-bottom:10px;
margin: 0;
}
#content .grid .product, #maincontent .grid .product{
border:2px solid #000000;
background:#c2ab90;
clear:none;
float:left;
overflow:hidden;
margin:20px 20px 20px 20px;
padding:30px;
width:165px;
min-height:325px;
}
#content .grid input.mp_button_addcart{margin:10;}
#content .grid span.mp_product_price{font-size:14px;}

I have a picture if that would help. Any suggestions?

Thanks.