Good afternoon Scott,
Thank you for replying to my post. The data is being sourced from a geodatabase and it is not project specific. Under the Status tool, it indicates features are editable. I have also noticed that the same applies to adding lines and points, as well as it is not an issue when adding polygons to an existing shapefile, it saves just fine. Feature classes seem to be the issue. I have not done anything different then I would while creating and editing with version 2.2.
Thank you,
Liam