I re-did my site and the problem, above, is fixed.
Now I have another question.
I am using the Navication manager in 4.2.2 and adding in some Tab sub-menus. My Tabs that have a drop-down menu attached are 1px taller than the ones that do not have sub-menus.

I see where I can edit the tab template, but I'm not sure what to change.
Edit: Another possibility is that the Tab with the drop-down menu is looking at the stylevar or CSS height of the "selected" tab, because they both appear to be 1px larger along the bottom.
I am attaching a screenshot of what I mean.