I think the issue is to do with the values that you have stored in the database. Did you type it in or copy and paste? This could of led to unwanted white-space in the values stored in the DB.
Also curious as to why its being done at DB level when you can log into WordPress and do an import of a DB CSV file. This will import any blog posts, content, imagery stored there as well as other users. The reason I say this, is because it appears to be a new site setup rather than actually having to setup a new admin because of a hack (as alluded to why you would have to do it this way in the help article you linked to.)
I feel that in order to fix this issue, you are going to have to set up a new installation of WordPress with a fresh DB and start again.
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