POST ORDERING BROKEN IN ADMIN AFTER UNINSTALLING THIS PLUGIN!

I installed the plugin, I tried it, then I uninstalled it.

Now, all my posts in worpress admin are showing from oldest to newest and also if I clic the date column to reorder them in ascending or descending order, this does not work, also the ordering is not working even if I click the title column in order to prder posts by title. Order is always shown from oldest post to newest post. I am getting crazy! Please tell me why this plugin broke my post ordering function of wordpress admin. The problem only happens in admin post lists, not in homepage.