When Blogger changed their dashboard and how you manage their pages, I can assure you that you weren't the only one confused. I had to spend about an hour figuring it out. However it is now all set up and ready to go. Here is the latest update on how to create a custom navigation for your blog on Blogger.
<a href="INSERT WEBPAGE/WEBSITE URL HERE" target="_blank"><img alt="Me" src="INSERT IMAGE URL HERE" height="30" alt="INERST NAME OF THIS BUTTON" style=”float:left; margin: 0px 0px 0px 0px;” /></a>
Copy the above code and place below and then fill in the blanks for each subsequent button you have for your navigation bar. For full details, see the video.