The same thing with buttons has been there in a few versions of iTunes, though as I can recall right now, it's OK in the latest version. Then there's the Remote app, which has always been a bit of a mess. If you open an iTunes Library with it on the iPad (not sure about iPhone), the design is still that of the pre-Yosemite days, destroying the feeling of it all being a cohesive ecosystem. Then there's the WWDC app. Again, I think it's fixed now, but at some point there was a search button both at the bottom and at the top at the same time.