That just means that you recently closed a tab with settings open twice in a row. Even though they are the same thing, they are recently closed tabs.

Unable to reproduce the issue on Win-7 using chrome reported version #64.0.3282.186 and latest canary #66.0.3357.0.

Attached a screen cast for reference.

Following are the steps followed to reproduce the issue.
------------
1. Opened chrome browser and navigated to chrome://settings.
2. Closed the settings tab.
3. Opened menu and clicked history.
4. Observed settings in recently closed tab.
5. Now opened chrome://components and closed it.
6. Observed settings and components in recently closed tab.
7. Now again opened chrome://settings and closed it.
8. Opened menu and clicked history and observed 2 settings tabs being closed.
Note: As per comment #2, 2 settings are shown in menu->history as those tabs were closed recently.

zlatarevfx@ - This doesn't seem to be an issue. Could you please confirm if 2 settings shown in menu->history are the tabs that were recently closed by checking it on a new profile without any apps and extensions and please let us know if the issue still persist or not.

Thanks...!!

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As there is no response/Feedback from the reporter for comment#4 from long duration, hence closing this issue and marking it as Won't fix.

@Reporter: Please feel free to raise a new one if the issue is still seen.

Thanks!