Am I using it right?

[Rydey]

I use both the phone app and the computer version of Duolingo for Italian.... my question is . I use both everyday and do the same lessons. So why do I get lessons on my phone that show up as needing practice, yet this never happens on the computer version? If I go into my vocabulary it shows that word strength has gone down dramatically yet all my lessons look as if they are "at full strength". Am I missing something? Should I be seeing lessons go from gold back to their original colour, like on the phone app, or does this not happen? Should I be doing lesson practice manually or should it prompt me?