I dislike the pedigree view too, it's without merit of any kind.
As far as finding the last person viewed when you sign in, here's a shortcut:
1) Go to the default pedigree view.
2) There is a box under the tan tool bar across the top of the page. It says "Find a person..." in the box. Mouse over it. It will bring up the last person viewed immediately.
3) Roll down and click the name.