@ralvarez. Thanks for posting. I looked at both of your pages. However, it is hard to diagnose anything with just that. The best thing is for you to grant me a temporary admin login so that I can go in and see the page myself.
I don’t understand what widgetkit is. Is it a joomla plugin? Or is it a joomla module?
Another thing is that if you want to display a module in a tab, you need to set the mode to either module or position, not text. Have you read through the documentation?