Stacey...the dimensions may be the same, but the original image itself is downsized. You have to click on the image itself (or ZOOM IN) to see it in  the original size.

For example.... I click on thumbnail for image by artist "A" ..... the first image I see is sized at 700 X 749. The image was uploaded as 947 X 1013 

Making the image smaller than the original on first viewing is making the images appear ragged and not anti-aliased. And not everyone will bother with the ZOOM and therefore, the image the artist uploaded is not portrayed as the artist wished it to be.