Why does custom event notification add an extra column choice?

[Jade Melcher]

Added the custom event, added the transition and edited the post-function all according to the documentation.

https://confluence.atlassian.com/jirakb/configure-a-custom-event-notification-for-a-specific-jira-workflow-transition-or-status-720831525.html

Why does it make you drag it into the transition name QA Notification 2 when the Status name is QA?

[Nic Brough -Adaptavist-]

The transitions between status have been defined that way by you or your admins. 

To answer "Why does it make you drag it into the transition name QA Notification 2 when the Status name is QA?" we need a few points:

A workflow is a collection of status, with transitions that allow you to move an issue from one status to another

A board is a set of columns representing your workflow.  A column contains one or more status in that workflow (a status can only be in one column, but a column can contain many status)

So, it makes you drag it to QA notification because that's the column containing the QA status and your "drag" is representing a transition in to that status.

The events fired by a transition have nothing to do with the behaviour of the boards.