When we go to Transactional Note Types and select 'Show in Billing,' this transactional note is no longer available in the Project. To show the notes in billing, we have to create and save a project. Then go to the Client notes and create a note with the project name. When the bill is drafted, we have to cycle through the notes to make sure we are applying the correct note to the correct invoice.
Transactional notes should have the ability to be shown in billing and the project, NOT one or the other.