Thanks for letting us know. If you notice any other typos, please post.

This idea will be considered. However, SL issues were removed from the ACCA website due to privacy concerns at the strong recommendation of an IT security firm. That concern is mitigated a bit by making SL only available to registered users, but that still might be too open for the experts.

Thanks for lettings us know. This has been fixed.

Marking a Hymn as a Favorite is already possible. Just touch the heart icon on the song and you'll find it in the My Favorites section. The multiple lists idea is interesting. Please post that as a separate topic as I'm going to close this "Favorites" one. 

This was fixed in last update, v. 4.2.1

At this point, we are not seeing any evidence in our crash logging / error reporting of a widespread issue affecting multiple users. In your case, we recommend uninstalling and reinstalling the app on your device.