Under step 2 of the requirements, it reads:
Pass one of the following exams during the 2017 calendar year.
The way I interpret that statement is that passing only one of those two exams (413 or 414) is required, even though they are part of a "series of two exams".
I am not a Microsoft employee.
Hope that helps,
Phil Streiff, MCDBA, MCITP, MCSA