Several Days of Disturbed Sleep

I am dissatisfied with my sleep experience and would like to talk to a manager.

Catalog Design

In describing the design of digital library catalogs, several of my readings and lectures have explained that many users have trouble distinguishing between title, subject, and author searches.

As an information professional in training, I accept that and will try to work with it. But I honestly don't understand it. How can those distinctions be unclear? What is there to not understand? It sounds like this kind of confusion is a significant motivator toward more integrated, keyword-based, 'google-like' search tools. Personally, I don't use those if there's any way around them. I don't want a mixed-up jumble of results from anywhere and everywhere. I want to know what I'm getting and where it's from so I can search categorically and methodically.

I feel like this is some basic disconnect I have with usability issues in catalog design and I'd like to understand it better.