Surprising, actually. I would not call these two slightly different, but two fundamentally different things - "we read a little" means that "we are reading something for a while now", while "we read little" means "we rarely ever read, and probably not right now either".
Well, it has happened to me in the past that irrelevant sentences of previous skills show up when I strengthen a skill, so I guess the purpose of this is an overall revision.
However, this sentence appeared when I was learning the Time skill for the first time, and it even showed λίγο as a new word. Should λίγο be a new word in the Time skill? Is there maybe a glitch?