Mod requirement issues

[Syluxs]

So I just got a riven rifle mod that requires me to get 4 caches without raising any alarms. But I've been running a few missions, get a few caches but because of the mission requirements to finish the alarms go off anyways and I fail. Am I missing something? 

[NekroArts]

This one is tricky to finish. I've read from other threads of this requirement and the solution that they propose was to find two, quit the mission, play the mission again, find two more, and finish the mission.

[rudman88]

go to earth sabotage mission do it solo ( some guys are crazy)

with loki and a bow. msut have animal instinct and loot detector

the mission lvls does not affect the drop / mastery ( wwhat your unveiled will be totally random)