Deadeye 1 is not tracking headshots correctly

Deadeye 1
Perform a headshot with DMRs. - 100
Inflict damage over 75m with DMRs. - 5000

Deadeye 2
Get headshot kills over 200m with Sniper Rifles. - 150
Get kills with Sniper Rifles. - 300

Deadeye 1 is not tracking headshots with DMRs correctly.
attached clip show me checking the challenge at 18/100, getting 2 headshots, and the counter is still at 18/100 even after match is over.