A. To resolve the issue of duplicated songs in playlists, first, try to manually remove duplicates. Open the playlist, tap on 'Edit', and then delete any duplicate entries. If the problem persists, consider clearing the app's cache. Go to your iPhone's Settings, scroll down to MUBR, and select 'Clear Cache' if available. If not, uninstall and reinstall the app to reset its data.

B. Check for any available updates for the MUBR app in the App Store. Developers often release updates to fix bugs. To do this, open the App Store, tap on your profile icon at the top right, and scroll down to see if MUBR has an update available. If so, tap 'Update'.