It looks like your "Games I Want" stack is empty so the games were removed: http://www.gamespot.com/profile/BeNOwNz/stacks/games-i-want/12693921/

What browser and os are you using for further testing purposes?

We recognize stacks are lacking a lot of the utility they possessed in their earlier incarnations, specifically the management of stacks with a large amount of games; the feedback is most definitely appreciated. We are currently working to solve the current challenges with stacks and improve the overall usefulness of them.

Np! You can't delete the default stacks such as "Games I Want, Games I Own" etc; those are tied into the functionality of the site. A example of this functionality in action can be found on any gamespace like: http://www.gamespot.com/beyond-two-souls/summary/ Click the controller icon in the header and you'll see three default stacks for quick addition and removal of that game.

You can delete custom made stacks in the stack's detailed view. In the right column, there is the option to edit or delete your stack.

@Diablo-B: Look in the top right when scrolled to the top