On Kbin, your comment has 0 upvotes and 0 downvotes (at the time of writing this), but when I view your comment from the original instance, it shows a score of 1.
So I guess lemmy.ml defaults comments at 1 point.
EDIT: Immediately refreshed the original instance, and I'm also at 1 point within 3 seconds of posting. So yeah, that seems to just be the default score. And upvoting my own comment didn't change the score on lemmy.ml. But also, I upvoted your comment, and you're still at 1 point on lemmy.ml. So I dunno if that's a sync issue, or if "unscored" and "1 upvote" both equal "1" on the original instance.