Marketpress 3.x alignment grid issues

When I mad marketpress 2.x the grid was off and sloppy. I was given this css tweek
.mp_grid .mp_one_tile:nth-child(4) {
margin-top: 0;
}
and
body.page #mp_product_list.mp_grid .mp_one_tile .mp_price_buy {
position: absolute;
bottom: 0;
left: 0;
}
however these dont work anymore. one support told me the theme css was messing with the 3.x version and added
.yui-ge div.first .mp_product {
width: 100%;
}
all this being greek to me. The product images are way to large and I liked how they were in 2.x and

How can I align the add to cart and the prices so they are even?

Also the excerpts are showing up on product single view at the bottom.