Issue: Losing 2 post counts after deleting double post?

Is it just me, but recently I was thinking of deleting one of my post due to making double post, but since it's lagging and the page won't redirect to the new page after clicking the Delete button (I'm not sure if it's the server's part or the browser's part), that time I 'deleted' my posts twice that my post counts literally decreased by 2-3 instead of one.

I'm wondering if it is a bug?

I often do double posting but I delete it immediately. I didn't had your problem. Maybe is it because your browser?

Hmm, probably, but I think it might not be the first time I'm having lost post counts, and iirc, it occurs at times when I'm posting at The Playground section for some reason, even though the occurrence may be rare for me.