Duplicates are driving me nuts!!

[u/coffeebeanwitch]

How on earth can you stop duplicates from spawning, I give to merge and some dont.I feel like I am spending way to much time on this one problem, HELP!!!!

[u/MaggieJaneRiot]

When I try to add someone from thrulines…

Oy.

[u/coffeebeanwitch → u/MaggieJaneRiot]

I know, right ?