The reason the pictures may be distorted on the various lists is because when a picture was uploaded using the old version of the Champdogs software it was cropped to be 300 pixels wide but allowed to be any height. When we show a picture on the lists we force the picture to fit a 4:3 ratio and that can result in the distortion.
All landscape pictures are now cropped to 300px * 225px (4:3) so no distortion will occur. You have the option to upload pictures in portrait and they will be cropped to 300px * 400px (3:4). However if you choose to use a portrait picture on the listings then it will appear distorted. Portrait pictures will also appear distorted in your gallery, but if you hover over the picture you will see the full size version.
You have full control over which picture appears on the various lists and can even upload a picture which does not even appear on any pages of your account to use. Initially we default to showing the first picture on pages as we did on the old champdogs, so if you have a distorted picture just update your details and choose a different one.