That's a confirmed bug and will be fixed next update.
I've noted this and will see about including a setting to use the different message styles.
Once I found a suitable fix in the auto welcome app, will be copied across to this app.
Would something like this work? That's using IPB4 own internal horizontal form class and is a relative easy addition I can provide.
Good idea, will include next update.
When the form app creates a new topic upon form submission? Or a custom field as part of the form your creating?