Some of reasons may be because people simply don't know answers for your questions(watched anime/manga long ago,or just watching a lot of anime's,reading manga's and can't remember in details what happened in each chapter/episode of specific anime.Other reason that might be is your question just slipped through eyes,when people ask a lot of question in some period of time(mostly short) or they just forget to answer it. Some question cannot be answered or are not suitable for wikianswers anime,some of them are not specific enough.