I had troubles creating a custom domain properly. It first worked and then went bananas.
Then I have reset my custom domain DNS in order to start from blank page.
I also have removed the custom domain from my Github repo page.
Then Github says I can access again my GH page at the usual link : my-account.github.io/my-repo
Though when I click it I am redirected to the custom domain I have mentioned. Is there any reason for this ?