It sounds like like you're uploading your full-
size image in the thumbnail line, because there's 
no image on the actual cel's detail page.  The 
thumbnails are what show up when somebody clicks 
a section from your main page.  Then when 
somebody clicks a thumbnail, they get to the 
cel's detail page where it displays the large 
image.  When you're uploading an image, try 
entering it in the line that says Large Image 
instead of the one that says Thumbnail.  Then you 
can click Make Thumbnail and it will make a nice 
small image that displays on the section page 
(you might have to first delete the existing 
thumbnail image).

My opinion is that even for the large images your 
images are a bit too large.  My screen resolution 
is 800x600 and I can't see the whole thing on my 
screen at once.

I really like the cels you have so far, 
especially King Endymion.  Congratulations on 
getting started in such a fun (and financially 
draining) hobby!  I hope to see more from you in 
the future.