Why did mangago put everything on my "already read list" and nothing in I'm currently read...

I'm assuming it's just a system error while everything is kind of half working and half not working and the site is experiencing a mid life crisis. I imagine they'll fix it later on, I wouldn't worry too much for now. Worry when they say "no we're not fixing it." which they haven't done yet so there's hope for everything to be restored to how it was before.