Drinking whey protein in the morning and again in the afternoon after a workout; am I overdosing?

Here are some facts. For an athlete, your protein needs vary from 1.2g/kg to 1.7g/kg daily. So, you can take your weight in kilograms, and multiply by 1.2 to see how many grams is minimum. Then you can multiply by 1.7 to find out the maximum. Then measure how much whey you drink both times of the day and see where you fit in.