Why mautic doesn't count sent emails corrently?

I have created a campaign to send 150 emails but the cron job runs every hour and sends 5 emails/hour. When i run the campaign, mautic lists 100 sent emails but actually only 5 are sent. Is this normal or an issue? Thank you.

I have created a campaign to send 150 emails but the cron job runs every hour and sends 5 emails/hour. When i run the campaign, mautic lists 100 sent emails but actually only 5 are sent. Is this normal or an issue? Thank you.