I think you misunderstood the document, every league have the exact number of allocated spots for EL and CL, and that number can only be changed if one of the clubs from league win a CL or EL and hasn't qualified for CL trough league table. I highly doubt they don't have fixed number of spots that can compete in EL and CL from every league. Hypothetically speaking, what if Dortmund wins German CUp and qualifies for EL, instead of who they should play, or if they don't win it, who's gonna play instead of them?