Action emails get sent out once a day at 7:30am Pacific.
Yes. Depending on the type of Action Email, you can manually stop an email from being sent. Do this within the Action Email Queue.
Once a day, Vin65 gathers all of the abandon cart sessions and places them in the queue.
It depends, but most often yes, it will still send. On the tech side, the abandoned cart is based off a unique cart session, only if that unique cart session would be completed it would no longer send.
Most often no, but it depends. Vin65 checks once per day to see if the email is still applicable to be sent. If the card is updated before the Vin65 check, it won't send. If it's done after the check the day it's supposed to send, it will still send.
Queued action emails are not affected by template changes. They can be modified individually. Alternatively the queued emails could be removed and then readded to the queue. Any changes made to the template will reflect onto the new queued emails.