Or maybe you just checked recently? Were you ever giving away something before? Not sure, if it's correct what I will say now, but I think that at some point months ago, giveaways in our completed history were hidden/cleared for some reason (website upgrade?). So, you see many people with dozens or hundreds giveaways, but with almost no +/- reputation. And if you check your history, you won't see some old giveaways.
That being said, I was unable to see my old giveaways, when I started being active again some weeks ago. And I didn't had + reputation for the past ones, they were eaten by void
(unless it's intended to show only recent reputation, I don't know how it works.
Or these are two different things, i.e. missing reputation and old giveaways history and incorrect giveaways number?
To be honest thought, I think that I can have the same problem too
At some point I got the feeling, that the number of giveaways I created is less than the number shown, but I was wondering, if there's a point in reporting it - if this happens globally for many/most of people, is there a point for only me to have it fixed? Maybe they should look into it globally?