I read on another Microsoft forum that it is by design and will not be changed.
Here’s what I found easiest on Win7:
-Right click on your title bar or menu bar
-Enable “Show tabs on a separate row”
-Goto Tools>Internet Options>Tabs
-Deselect all the Tabbed Browsing options
-Move down to the section: “When a new tab is opened, open:”
-In the drop down menu select “Your first home page”
Click “OK” and then “Apply”
Restart IE11. Going forward your will, unfortunately, have an extra bar across the top, but every time you open a new window it will be the first tab, so to speak. You won’t have all the tabs populated across the toolbar.