I believe my association fell victim to the same problem the original poster found. At first we were incensed and I almost filed a complaint to ask the support team to see if the other team was cheating, but thankfully I saw this thread first. Please see:

Exhibit A: Team "The Bad Company" wipes their opponent before meeting us in the final
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Exhibit B: "The Bad Company" then faces us in the final
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Across TWENTY association matches, they didn't conceded a single goal. And these were all competitive Gold Division 1 teams.