On Gihub, it's possible to both leave a comment and close the issue in one action. It seems like Duga doesn't pick up on this, and only reports on the comment having been made.
She should do one of these things:
Post two separate messages, one for the comment, and one for the close.
Post a message like "jacwah closed and commented on issue..."
This is usually because of a concurrency issue with the database, as both issue comments and issues closed are saved, and GitHub sends two webhook requests to Duga for this.
http://chat.stackexchange.com/transcript/message/23688861#23688861
On Gihub, it's possible to both leave a comment and close the issue in one action. It seems like Duga doesn't pick up on this, and only reports on the comment having been made.
She should do one of these things: