Thumbnail help!

I have a set thumbnail size, but when it crops it its only cropping down to the height, not the width… is there a way to fix this? I dont care if it takes off a portion of the image, I just want it to fit it within my size

I have

add_image_size( ‘port-thumb’ 206, 137 )

but its not working. I’ve tried adding true in there and its still only cropping to the height.