Separate repo with own config file are ignored and only one is used.

[MartijnKaijser]

We have several repos in our organisation and have successfully added the mention-bio our main repo.
https://github.com/xbmc/xbmc/blob/master/.mention-bot

Now we added the mention-bot to one of the others as well
https://github.com/xbmc/repo-plugins/blob/master/.mention-bot
It seems however that it's ignore this separate config file as you see on the PR made below it took the config file from "xbmc" and not the one from " repo-plugins" .
xbmc/repo-plugins#683
This PR was made after we added the config file in that repo.

Are we missing some configuration to make sure it's handling each repo separate or is this a bug?
Each repo (not the main organisation) has the https://mention-bot.herokuapp.com/ payload URL in webhooks.
We also noticed that if you put the webhook on the organisation level it will use https://github.com/xbmc/xbmc/blob/master/.mention-bot for every repository and not that individual one.

Thank you.

[MartijnKaijser]

To update the issue:
It seems actually that when you have multiple mention-bot configurations in your organisation (one in each repo) it will fallback to the default configuration.

As such i had to remove all but one configuration so it would pick up the correct config again