I have the media image sizes set as
large - 600x600
Medium - 300x300
Thumbnail - 150x150
I uploaded a 600x600 image and when going to the WP Retina 2x Dashboard
the thumbnail and medium have a green tick but the large has the yellow triangel with a 1200x1200 recommended size
Why is it doubling the size of the large image size I have set?
Should I be altering the media image sizes?