That's bad. It's first time I see Copyleaks giving a false positive. All other tries with well known forum users have negative only results. Nevertheless you don't have not only several consecutive AI detected posts, but not even several ones. You gave me some doubts, but I still think that accounts detected in this topic do use AI. I experimented with many accounts and as you can see very few have multiple detections, and all of them look like they use AI even before using detection tools.

But your finding about Copyleaks frustrates me anyway. I thought they work better...