SparkIT

AFAIK it’s because of the federated system.

This instance is still new so it fetches content little by little when users interact with external communities and this is also true for votes. There could be federation issue to fix, though and sometimes it takes time to sync.

In general, to see the real number or all the interactions of a post you can open it in the original instance.

On kbin select “copy url to fediverse” in the “more” menu and on lemmy it should be the icon with the fedi logo.