After reading through these replies I am more confused than enlightened.  Am I understanding this correclty? Unlinking a line items does nothing really?  The replies are saying that when you unlink a line item associated with a customer, it will then show up as billable and still shows up on the right side in the Add to Invoice section when I am in the New Invoice creating mode. So what is the point of unlinking when it does nothing?  Or am I missing something?