Ok, I got the fully maximized the right size. You were right about the negative numbers for the "screen edge clip" settings in the "Window Borders" section. Top was -4, Bottom was -2, left and right was -2. Changed them all to 0 and it's now fully maximized. Thanks so much for that tip! There are a couple of other skins with this same issue and now I know how to fix that part.
Now the other issue I can't figure out. I don't even know where to look in Skin Studio to see what the setting are for that not closing out a window (if it's not maximized) with the close button. I have also seen a couple of other skins do this exact same thing also.
If you can point out to me where to look and what to look for, I'll do it immediately!
The only thing I've seen so far is right under the "Window Borders" section called "Title Bar Buttons - Free Form". Right under that is "00 Close Window", "01 Maximize Button", "02 Minimize Button", and "03 Maximize Button". Highlighting "00 Close Window" and looking on the right side I see under "Actions", "Actions on Click". Choosing that one shows "Close Window". Dunno what's up. The close button closes it alright as long as it's maximized. If it's not maximized, clicking the button maximizes it instead of closing it. Weird and a bummer to have to go through for closing windows.