Yosemite is riddled with blantently broken issues like this. I'd love to enumerate them for you, but frankly, Apple should be doing that with a flood of automatic updates. Of which I've seen 1 since installing Yosemite.
As an everyday user, there has been a massive drop in quality. Far, far worse than previous OS X upgrades. This is just not a case of people wanting to complain for the sake of complaining. I've been saying it for weeks now: Yosemite is Apple's Windows Vista.