Different layout for quantity pricing and variant pricing on product list

Hi,

First, to have both buttons on the same line, you can add such CSS:
.hikashop_listing_img_title form { display:inline; }

Then, you have the quantity input field area which takes a whole line. You can either remove it by changing the quantity input display option under the products options tab of your menu item, or have it on the same line as the buttons with such CSS:
.hikashop_listing_img_title table { display:inline-table; }
I would personnally recommend to remove the quantity input field to make it look like the other products.