irock - 5:27 am on Sep 2, 2012 (gmt 0)
The reason I changed my site structure is because after I read an article (excerpt below), I strongly believe I've messed up internal links.
"The “Internal Links” page identifies which pages on your site are most frequently linked from your own site. This can be a very interesting report because internal links give search engines clues to which pages the sites’ owners consider most important. If many internal links are going to pages that are low priority and few are going to pages that are higher priority, the navigation may deserve another look."