e-Newsletter trouble

We have a problem with E-Newsletter plugin that we really need help with.
We have around 5000 emails and we had to pause sending out emails.

Once we started sending again, we noticed that the same number of emails is in queue, and we already sent around 2000 emails. We paused for now, but it would be helpful to know if the emails we already sent newsletter to will recive once again.

We checked to skip the emails that already recieved email.