Resurrected topics from years ago?

Recently, some old topics turn up in the “Latest” category but when you look into the topic, there is no new content

Is there any reason why they are re-activated?

For example Recording debts and payments
where the most recent entry is from 2015

It’s just spammers trying to inject content into these topics. Spammers are banned and their posts deleted but because of the activity on the topic, it shows up under Latest. It think eventually developers of this forum could fix this as it doesn’t really make sense to show up under Latest.