We are going to release TZ Portfolio v2.2.4 today. So you just need update your extension. It's will help you solve your problem.
Go to Global Configuration >> Portfolio Tab >> Remember Recent Article >> Choose "No"
When you click to view an article, TZ Portfolio will remember its position. It will auto-scroll to recent article that you just viewed, It will help you follow your story easily. It's a feature of TZ Portfolio, we will have option to enable/disable in the next version.
Thanks for your answer.
Is there a way to disable it now till the next release is available. My customer doesn't like the scrolling down.. and I also find it confusing when I click on the menu item more then once.