The OP and your reports agree: the Boskin committee changed the way inflation is calculated. The new way says there is less inflation than the old measure said.

The OP and your reports agree: the Boskin committee changed the way inflation is calculated. The new way says there is less inflation than the old measure said. So, if the new measure is actually wrong, then inflation is underreported now, when it used to be correctly reported before. The Boskin committee believes it was overreported before and it is now correctly reported.