I have installed the tool and added some feeds.
Notification settings are as shown but I never saw a notification window.
Pressing Review show the window...
Quote: Notification settings are as shown
You can give a link to the screenshot
Maybe someone can send working settings?
Might be more useful than a screenshot of mine not working ones
You can delete the settings. Then they will be the default. The path to the settings "Help - About - Information"
Notifications appear briefly in the top-right corner of the screen or stay there until you dismiss them.
Mail and Calendar notifications in the upper-right corner of the screen
You can set options in Notifications preferences to change how notifications appear, and stop or pause them.
View notifications you receive
Get details: Click Show, or click the notification.
Respond to email or text messages: Click Reply.
Save an AirDrop item to the desktop: Drag the item from the notification to the desktop. (Otherwise, AirDrop items are saved to the Downloads folder.)
Respond to calls: Click Accept or Decline. To reply using the Messages app, click the disclosure triangle next to Decline, then choose Reply with Messages.
Choose when to update software: Click Later, then choose a time. For more information about updating, see Keep your Mac up to date.
Repeat a notification: Click Snooze. The notification reappears 15 minutes later. To choose when the notification reappears, click and hold Snooze, then choose a time.
Get help from apple support
if this doest help you then this might be helpful.