Sometime recently, something was changed that is causing incorrect behavior on SKs. It used to be that Reaper's Touch and Harm Touch were on one timer and Reaper's Mist was a separate timer. But, now all three are on the same timer. If Reaper's Mist is activated first, all three skills go into a 10s cooldown. If Reaper's Touch or Harm Touch is activate first, all three go into a 2m30s cooldown timer.