In the Beginner Sentences (N5) schedule there has just consistently been 10 sentences that were automatically placed in a category called "can't study" and I don't know how I can study them. Is there a way I am supposed to unlock them? Or is there something I have to manually do to add them back into the sentences I can study?
They are too short - so they cannot be used in the sentence jumble questions. If you change your schedule settings, you may be able to get them to activate (such as the basic study style, or the listening if you have renshuu pro).