App Store

Hi all, 

We have the ability to install apps from the catalog turn off so people can only request them however I can install a couple of apps without requesting them.  If I go into the SharePoint Store and filter by Best Apps of the Year then I click on Nintex USA it says I need to switch to classic SharePoint Store. Once I swap over to that then it says "Good News - You already own this app" and it lets me app it.  Is there anyway to block these apps?  Thank you.