I just noticed in the Computing category you have a category listed as "Apple & Macintosh" and various sub-categories underneath that.
Apple & Macintosh doesn't really make any sense because Macintosh is just a computer product brand name made by Apple Computer Ltd in the late 80's early 90's. It actually comes from the fruit Apple of the same name (Mcintosh) but with different spelling if you want a piece of truly useless trivia!
It would be like having a main Computing category called Microsoft & Windows or Intel & Pentium or Sun & Sparcstation, those should be sub-categories not main categories.
I also noticed you have all manner of Apple consumer products (also listed under the Apple & Macintosh Computing category), despite having other more appropriate Categories they should be in, the only link being that they're made by Apple.
Apple iPhones should be in the Consumer Electronics > Phones > Mobile & Cell Phone category under the brand Apple.
Apple iPods should be under the Consumer Electronics > Audio MP3 & HiFi category under the brand Apple.
Apple iPads should be under the Computing > Tablets category under brand Apple. You might want to consider combining Tablets and and eReaders into the same category.
Could I please suggest then that you consider changing the Apple & Macintosh computing sub-category into simply Apple or Apple Computer or Apple Computers and move the iPod and iPhone sub-categories into more appropriate categories under Consumer Electronics and iPad into Computing > Tablets.
Thanks.