Contracts the Hutt. (Star Wars: Battlefront (2015))

In General,a little belatedly bought the game,began to take contracts.
As I understand it all in the game 3 rifle with a scope,but in contract to DLT-19X I accomplished my mission to Perform 3 series of murders with a rifle with a scope,in this case the contract on А180 performed 9 kills with most of these rifles with a scope.And I performed these murders of Bo-rifle.Now I've tried every weapon that I have,and I don't hold the murder out of him like a rifle with a scope.How to understand this?Or that I counted those Killa was a bug?