Get only 1 Bounced Email in Camaign

Hello,

I got a weird problem.

I tried to test the bounced mails on the system.
This is what I did and what happened:

Made a campaign with 3 testleads which have all invalid emailadresses to proof that all emails comeback a bounced/invalid Emails.
After sending the campaign to all 3 Emailadresses and after the Scheduler is finished I only get 1 Email marked as Bounced/Invalid but all 3 should be marked.

Does anyone have a tip for this problem??

Thank you for every tip!

Greetings

ok i have a second weird thing:

the X-CampTrackID is in every bounced email header diffrent.

Maybe this is the Problem or does it search on otherway which email is bounced and which is ok??