John-D
Can you give an example or screenshot?
How big is your logo?
This what the information says about Logo:
Upload a new logo
Choose an image in the .gif, .jpg or .png formats. We will proportionally resize the display of your image. We will not, however, resize the image’s data. Therefore, to speed load times, it is recommended that you keep your image close to the default image size (817px × 170px).