In order to remove the appended digits, we suggest you change the name of the blog post and check if any digits are appended to the new name.
Nothing similar has been reported so far. If the above suggestion doesn't fix the issue, could you tell us how exactly did you backup your blog post and how did you restore it? We think that maybe the backup process appended these digits, giving the backup a unique name.
I hope you find this helpful. If your problems persist, don't hesitate to contact us again.
the Telerik team