Strike Teams can only equip one item/replaced eqipment just disappears

Negative traits don't necessarily have to keep you from your missions. Before I figured out the strike teams, I was sending them on everything regardless of chance of success.I figured the XP would be better than not leveling up. My worst team has four negative traits but still does just fine. I reject missions without at least 60% chance of success with most of them being 80% or better. They almost never fail. When they do, no negative traits for missions with a high chance of success.