Recent includes reposts and studies that are continuously up. If I've seen a HIT once on logged HITs, I've made the decision to try and accept it or not at that moment. I don't find it useful to know when it reposts because either I have a PandA on and it catches it, or it doesn't. But, I only need to know when it catches it, not when it's reposted but, I've missed it.
So, it's distracting and useless for me to see recent because, everything that I need is also on logged in chronological order.
That's why I think they are separate.
Just my opinion though. Everyone has a different method that works for them.