Tabs do not leave first window entirely anymore

When I take a tab out into its own separate window, it kind of stays in the first window. When I attempt to close it in the first window, it gets closed in its own window. This has never happened before!

Also when I attempt to reopen the closed tab it starts opening untitled tabs. And if I attempt to close it, it creates more, more and MORE of those more I click the "close" button.