How do I mark time as billed in timesheet

How do I mark time as billed? Right now all my time in the time tracking system say unbilled, even though I've already sent out a bill for most of the time.

There are no invoices for my project in the project view) even though I created an invoice and marked it as open (in the invoice view). Is this part of the problem

It's like the invoice and time tracker are not connected.

Thanks