Integration w/ Slack Questions

I have the Asana app in Slack, however, I don’t get all of the notifications in Slack and some are sent via email? Can someone help me streamline this so all the notifications I get on email are sent to Slack instead of either/or.

For an example: I created a task and assigned to to Person A, who assigned it to Person B. Person B made a couple of comments. I received notifications of those comments on email. But not in Slack.