Two definite article together?

Hi,

The original sentence is "That, at least, is the hope of a panel of researchers who presented their work to the the annual meeting of the American Association for the Advantage of Science, in Austin, Texas. " (The Economist 22.02.2018 'Using domestic animals to make human organs').

I guess the editor treat "the annual meeting of the American Association for the Advantage of Science" as a proper noun, then use a "the" before this long proper noun. Therefore, two definite article together, is it right?

If it is right, I am still confused why the editor use it in this way for formal writing or emphasize something?