Why Is There A Note Automatically Appearing Above My Annotations?

You probably have the Auto-Add Markup to Annotations setting turned on. This can be disabled.

Turn on/off Auto-Add Markup to Annotations:

1. Tap the "+" in the top left corner if on document view
2. Tap the gear icon in the top right corner
3. Tap App Settings 
4. Tap Annotation
5. Turn on/off Auto-Add Markup to Annotations.