How to use Bulk Request for the same method multiple times

I am attempting to utilize the Bulk Request method within the API to invoke the same method multiple times, each with a different date parameter. The objective is to gather data for unique visitors over time, enabling the construction of a chart representing the evolution of unique visitors on my application.

Here is an example of how my request is structured:


However, in this specific case, I am encountering an issue where I receive the same value five times. Upon further investigation, when I make separate requests for each date, I obtain different values. Strangely, the final value I receive is consistently the value of the last request made. Any insights or suggestions on how to address this behavior would be greatly appreciated.