Alejandro,
I know you're upset about this but there isn't a problem or bad design in mojoPortal. You accidentally deleted the module containing your posts. The Module Settings page is where you deleted it from and that page looks much different from the post edit page. Further, when pressing the delete button, you were prompted if you wanted to delete the content "from all pages".
Knowing all of this, would you please remove the very derogatory post you put on your website about mojoPortal. It isn't true and is not fair. We provide this CMS free of charge and it works very well for thousands of websites. It has done so for over a decade. In fact, the version of mojoPortal you have installed was released 7 years ago and if you were to upgrade today, it would still work fine, just with more features.
I hope you will delete your post deriding mojoPortal.
Thanks,
Joe