Forced to repeat lessons
I've been having to do some of my Spanish modules two/three times before duolingo unlocks the next one. Has anyone else had this problem? It just started today.
Repetition of lessons is not a requirement for the next set of skills to be made available. But all lessons in all skills at the previous level need to be complete before you can move on to the next set of skills. It's explained very well in the discussion here.