Resizing Featured Image thumbnails

Hi,

I want to resize my featured image thumbnails.
I’ve read this at codex; Post_Thumbnails, but this does not what I want. I have tried like anything what I’ve read in Codex and on these forums.

What do I want? – I want my images cropped to 360×200.

As example, I got these 3 images as featured images for 3 different posts:
Image 1: 1200×798
Image 2: 2300×1800
Image 3: 2000×1000

If I use this code

if ( function_exists( 'add_theme_support' ) ) {
add_theme_support( 'post-thumbnails' );
set_post_thumbnail_size( 'Square-Panda-Featured' );
add_image_size( 'Square-Panda-Featured', 360, 200, array( 'center', 'center' ) );
}

The images are cropped to these dimensions:
Image 1: 360×239
Image 2: 360×202
Image 3: 360×180

As you can see, non of them have an height of 200px. It’s more or less. I want it both 360px and 200px.

How can I make that possible?