SNS bounce/complaints separate for each domain or all together?

Hello

I am a little unclear on the setup instructions, and want to make sure I am doing it right: http://sendy.co/get-started

I have 4 domains verified in my Amazon SES account for Sendy. It will be a separate brand for each..

In the setup steps 7 & 8, I have set up 1 SNS for bounces and configured all 4 domains to use that same 1 SNS record

Similarly I set up 1 SNS record for complaints and configured all 4 domains to use the same SNS record for complaints.

Is that correct, or am I supposed to set up a SNS bounces separate for each domain (4 total) and 4 separate SNS complaints records?

thanks Mark