Two issues with using workflow automation to send email

Hello,

I'm trying to use the workflow automation feature of invoice to automate an email to my customer when the invoice date arrives. Ex: I want to create an invoice with a future invoice date and on that date, have it email my customer.

The email successfully sends to the customer, however, I have two issues:
1- the status of the invoice did not change from "Draft" to "Sent" (shouldn't it have?)
2- there was no pdf of the invoice attached to the email (how can I get attachment to send on emails generated from workflow)?

Thanks in advance,
Jason