Why are my auto-responders not sending at the same time?

Issue 2: If I configure two different autoresponders, only one of them actually fires. Is there an explanation for this?

I have just added two email auto-responders to a cloned form of yours, I received them without any problem: 

- My emails: 

- Emails I received: 

Make sure you set different subjects to each email, otherwise you will receive both in a single thread giving the impression that only one was sent. 

Please  kindly test again and let us know how it goes.