Final answer:
The flaw in how electors vote in the electoral college was addressed by changing the way they cast their votes, from casting two votes for President to voting separately for President and Vice President.
Step-by-step explanation:
One of the presidential amendments that addressed the flaw in how electors vote in the electoral college was that originally, they cast two votes for President, but now they vote separately for President and Vice President.
Learn more about Presidential amendments and the electoral college