Should we be paying 9903.88.15?

We are importing a product from China (bamboo pet bowl - 39214.90.5650). On the entry summary, we are paying the 10% under 9903.01.25 and the 20% under 9903.01.24, but the 7.5% we previously paid under 9903.88.15 has not been listed on shipments we've received since July. However, everything I've researched says 9903.88.15 should be paid in addition to the other tariffs. What am I missing, or did our customs broker make a mistake?