I've just cleaned up any items that were added from the iOS version 2.3 app and were not assigned to any project:
songs, set lists, MIDI presets, MIDI devices, events, transactions: I assigned these items to your default project, so they will now appear in the app and the web interface. If you had entered these items more than once, you can now delete the duplicate items.
tags, event categories, transaction categories, notes, custom fields, documents, recordings: I deleted these items. You can add them now again if needed.
Please be sure you have updated to the latest app version 2.3.1 before adding items from the iOS app.