The thing is with the M7 Lancer i’ve got that one twice but it only says number of times complete it once And also the current challenge points for that gun is approximately 60,347 out of 140,000 points it’s currently use a percentage in 43% And plus I didn’t know that they actually reset the challenges Points to 0
On N7HQ, check your "Overview" (home) page. Recent Challenge Completions. You'll see "M-7 Lance Use" twice. That is because the second one is in the Reckoning Mastery:
Challenges > Aliens > Reckoning Mastery
Some (far from all) challenges appear in two places. For the weapons that do, generally it is 140k for the standard Weapon Mastery one, and 200k for the secondary one in the Aliens group. This also can be repeated, after you finish completing Reckoning Mastery (which then resets completed sub-challenges). This is essentially how they all work.
I hope this allays all your fears. Your account is working as it should. Spend some time perusing your N7HQ and with time and play, you'll figure it all out. It's also fun to track stuff in N7HQ, and manage how to maximize your Challenge Pts, if so inclined.
