I was able to confirm that those particular 4 Liahona issues do have errors when you attempt to download them with Gospel Library (I tested with the Android version of GL).
Note that this is a community-supported forum, and so there's no guarantee that anyone on the development team will see your report here. You can report problems using the Help menu inside your application (which sends email to
android-support@ldsmail.net).
Questions that can benefit the larger community should be asked in a public forum, not a private message.