product-grid - gaps on mobile device

I hope someone can spear the time and effort to help me..guessing this one takes some looking in my sorce code and viewing on mobile device

I have messed around abit with the product-grid to suit my needs
Have a look: http://pryljakt.nu/ and http://pryljakt.nu/roliga-prylar

All looks fine on laptop (IE, firefox, chrome)
Even on resize to col-sm and col-xs on laptop its ok
But when viewing on android/iphone/ipad there is gaps in the product grid.
Its like there is an invisible product box taking up blank space...
Have been trying to solve this for some time now. Some help would be great

Can understan why its OK in IE and Firefox when small size but not mobile