In Hikashop.css you have currently:
#hikashop_small_image_div > a {
float: left;
margin: 0 3% 3% 0;
width: 22%;
}
This should be changed to a class instead of a # instead:
.hikashop_small_image_div > a {
float: left;
margin: 0 3% 3% 0;
width: 22%;
}
Reason being, is because when you change the option in the dropdown box like a size or colour, it changed the #ID number of the small image to a _2 or 4 or whatever the number is, which therefore makes the #ID incrrect name and the thumbnails going at 100%.
So just letting you know so you can fix that
