Hi there,
Thanks for writing in! It seems you have some really long image (like : http://activedoors.com/wp-content/uploads/2015/07/Internal-Blind-French-Door-4.png) that looks odd when the width is 100%;
If you don’t want 100% widht for the image on search page then you can add this under Custom > CSS in the Customizer.
.search .entry-thumb img {
display: block;
margin: 0 auto;
min-width: auto;
}
If you want to remove the black background then you can add this too :
.search .entry-thumb {
background-color: transparent;
}
Hope this helps.
Cheers!