shrimp eat at a much different pace than fish. It's much more slow and steady. If you took the amount you were previously (over)feeding them, and spread it out to hourly feedings, they would probably consume it all. The problem is, when the food starts to rot they don't want it.
so feel free to feed more often, just in smaller amounts. Also you will see as the cherry shrimp population grows, it is HARD to overfeed!