My List function problems

• Some of the animes I added to the list don't show up in the app's list. They do show up on the web, though.
• I made changes to MyList in the app, but then I looked at the MAL on the web and it hadn't changed.
• I made changes to MyList on the web, but then I looked at the MAL in the app and it hadn't changed.
• How can I delete my entire list / several entries at once?

• My Profile List/Anime/Manga stats won't update! Days watched are incorrect!
• An anime entry keeps showing up in my "plan to watch" list even though I keep moving it to "currently watching".
• An anime entry keeps showing up in my "currently watching" list even though I keep moving it to "completed".

• How can I make my list private?
• How can I make parts of my list private (e.g., hide hentai)?