Issues with Image Dimensions

Hello,
I’m having a problem while importing images.
I try to create a rectangle with the same dimension of the picture, but it doesn’t get the right dimensions and I have to invert them, but is it normal? will it work with all the images?

As you can see from the pic, it’s stretched. But it works if I reverse width and height.
And of course I have to transpose the UV

Any solution?