If you have the latest version of Extinct, the only way to order the portfolio items is by sorting by date. If you have the older version which sorts based on menu order attribute of the portfolio, then you can either use the Quick Edit feature of Portfolio tab or better you can use a popular plugin like this one –
http://wordpress.org/plugins/post-types-order/
or
http://wordpress.org/plugins/simple-custom-post-order/
And if you have the latest version of the Extinct loaded, you can modify the date published to tweak the position of the portfolio. Hope this helps.