Maybe you should put little more effort on this case! because it's almost useless to use/display portfolio items with sorting if you don't or actually can't display more then 8 items due to page space or scroll, I bumped into this one and it's another thing that is limiting the use of the theme, the theme is great, its really powerful and rich in features, but this stuff really killing it's functionality.
Also i posted a "workaround"/suggestion in this forum for this case to add or replace the default pagination with Jpages plugin ( http://luis-almeida.github.com/jPages/customizebuttons.html) , this plugin will solve the problem, and is highly customizable with a lot of examples to choose from.
Frankly, I was searching the web for a solution for this specific problem and found Jpages plugin, not because i thought the plugin is cool...
So please understand that this case need to be looked at, and hopefully resolved in one way or another in future updates..