Well, the Colts scored one touchdown in the second half … and the referees gave the Colts a second touchdown.
The Steelers just wanted to make the game *interesting*.
Excellent summary.
Refs didn't give the Colts another TD, they gave them the chance to get another TD. Don't get me wrong, it was a bad call, but it was the Colts that drove the rest of the way down the field. They couldn't have done it but for that, but there was no causation.