I see what you mean,but like vlam said its not the theme creator,its the phone!
In any case,90% of people using s60 Theme Studio dont take advantage of the extra areas anyway!
Thats why the majority of s60 themes are just wallpapers and
incomplete,because the end users cant be bothered or dont know how to use
all the features theme studio provides.
The bottom line of it is........The SE theme creator is
better than Theme studio because,its fast,easy to use,and isn't too complicated.
The proof is in the pudding...take a look at
any theme download site and see how many
incomplete themes (of any phone model) you can find,i guarantee it will be s60.