Weapon load out help!

I need help. I want my lancer on my left D pad and my shotgun on right everytime I change it it puts my lancer on right d pad how do I get it to back to normal having my lancer and primary on my right d pad

That is the default. I don’t think you can change it.

Damn really I thought it was set up with lancer on left and shotgun on right

Sara Connor is set up that way for horde. Otherwise, I think the only way is to switch one for a pick-up weapon, then switch the second one for the first, then the pick up for the second. It’s actually easier trading with a teammate.
My wife plays as Sara, but hates the reverse set up.