Say you want to restrict the gallery into a 750 wide table. well looking at your site lets discuss you have a 600 pixel wide image and then a row of thumbs at 100 pixel and then your sidebar is 125 pixel say. You know just doing the math it is not going to fit.
The simply point is there is NO WAY to make it fit in such a scenerio. That is why the program has options.
My initial suggestion without actually seeing your site but only some little attachment would be to turn off your sidebar under sidebar settings globally only leave it on in the index.
!! Thats much better, thanks for that chuck, have a great day! 
Linear Mode
