Pinterest API not returning proper counts?

Question

Is there a specific way that Pinterest's Repins and Likes are calculated that explains the difference in the numbers the API gives me and what is shown on the actual Pinterest site?

Let's take an example, shall we?

This pin (https://www.pinterest.com/pin/449234131560970692/) currently shows it as having 355 Repins, 99 Likes and 5 Comments on a web browser.

Then when I use the API to get data from the Pin:

https://api.pinterest.com/v3/pidgets/pins/info/?pin_ids=449234131560970692

I see the counts as 290 Repins and a Like count of 90.

Why the difference between what's being shown online and what the API is telling me?

Thanks!