You're not alone!  I am a web designer, its what 
I do, and so if I cannot even hold over a 
7.something on presentation, there is something 
wrong. (not to mention that I give detailed info 
on almost every cel and I think the categories 
and gallery pages are clean and clear!) ~_~  My 
ratings started out in the upper eights and I 
was quite pleased, but now they are in the mid 
sevens and will probably keep dropping, knowing 
my luck.  I think the solution is just to turn 
it off like others have already done, and not to 
worry about it anymore.  I will probably do that 
soon.

It's a popularity contest, that's all it is.  
I've seen galleries that are no wheres near as 
nice to look at, with categories laid out no 
differently than mine with upper eights or even 
nines in presentation.  It's a pure populatiry 
contest.  And I am not popular ~_~ lol.  I've 
seen the same thing happen with a lot of 
people's galleries.  And some people lack the 
ability to be objective, and will rate you low 
on everything if they do not like the shows you 
collect.  Popularity contest + non-objective 
voters = a flawed rating system :P

Sometimes no matter what you do, things just 
won't change.  So I wouldn't worry about 
changing your gallery around in hopes of getting 
higher ratings, because it will just make it 
more frustrating if it never happens and it will 
taint the enjoyablity of the hobby.  :)