Echo's voice lines interrupting each other

When using Echo’s ultimate she will say both the enemy’s voice line AND the friendly voice line at the same time.

When using a melee attack on an enemy and shortly after kill them with some other ability, she will say a normal kill voice line but will interrupt herself with a melee kill voice line.

Also, Some of her cosmetic voice lines sound weird, like they are from a different voice actor (“Can or not”, “Double confirmed” and all her Singaporean lines).