Attempts are logged regardless of their success or not, in order to provide updates for the players. An attempt can be given one of 13 statuses to describe whether it was pending/valid/rejected.
An attempt having a status "Accepted/Victim Back In" is one where the victim was successfully assassinated but then the victim's partner was able to get his/her two kills and bring their partner(the victim) back in.
Want to know more about an attempt? Click on the attempt's number or status to visit it's hit page. You can also click on an attacker or victim's name to see their stats.