Tiny bug in retina image sizes

Hi @nikeo,
I was browsing my upload folders just now, and spotted what may be a tiny bug in the retina resizing.

I have my max image sizes set to 2048×2048.

For each square 1024×1024 image I have uploaded, I see:

1. my-image-name-150×150.jpg, which is 150×150
2. my-image-name-150×[email protected], which is 300×300
3. my-image-name-270×250.jpg, which is 270×250
4. my-image-name-270×[email protected], which is 540×500
5. my-image-name-300×300.jpg, which is 300×300
6. my-image-name-300×[email protected], which is 600×600
7. my-image-name-1024×500.jpg, which is 1024×500
8. my-image-name-1024×[email protected], which is 1024×500

Tiny bug: This last image should be 2048×1000, no?