I went to the store and bought way more corn than I needed.
What is the point in purchasing that much corn?
Really not sure to be honest.
I guess it was your mistake to overestimate about how much corn you needed. It's ok you can use them for multiple purposes.
Are you going to make a big deal of it?
It is fine to buy too much of a food sometimes. It is not like an estimate is always going to be exact. So no, it really is not a big deal.