Hersheys: How Many Pieces per Servings?

How many pieces does 1 serving in Hershey's Kiss have? I am explaining using 5 examples

1. Hershey's Cookie n Cream, it says 146 g so how many pieces would it be but on the back it's written 10 pieces

2. Hershey's Kisses Creamy Milk, it also says 146 g but there is also written 30 pieces on the pack

3. Hershey's Kisses Milk Chocolate, it says 340 g/12 Oz, and there it's written per 9 piece servings and when I looked at the back, there was written servings per container about 8, so what is this serving? Is it no. of pieces?

4. In the family Pack of the same as above (Milk Chocolate), it's written 18 Oz/1 lb/524 g, and per 9 piece serving is written, but I could't see the back image as I am seeing online on Amazon, but does this mean that the 340 g and 524 g have same amount? How can it be possible? What IS a serving in Hershey's Kisses?

5. Hershey's Valentine Conversation Kisses Milk Chocolate, there it is written 311g and again it's written per 9 servings? So what is the difference between 3. 4. and this 5.? Also which of these 5 have the highest amount of pieces and lowest? Can you please tell? Or not, then at least explain me what in the world is a serving and how I can calculate the pieces myself

Also there is another problem:

In Hershey's Miniatures, there it is written Per 5 Piece Servings, so does it mean that the whole packet will only contain 5 pieces? Though in the image it has lots of pieces and the qty, is 150 g

Thank You for Answering!!!!!!!!!!!!!!!