Howdy bloak,
Many of our librarian processes & FAQs are detailed here: https://openlibrary.org/librarians
Most data on Open Library is publicly editable by members. In this case, author merging is a capability that only folks who have been added to our Librarians usergroup can access because the process of reverting an accidental merge is quite time consuming (and so we have some training in place).
If you tweet @ our lead community librarian (http://twitter.com/seabelis) she can likely help you make this fix! Also, if you're interested in helping us make changes like this, we can invite you to our slack channel :)