Strange issue you have, months ago arsenal was switched up so that you can load a grayed out loadout, even if the items in the loadout are not present in the box. Before you were not able to at all, so it seems like you have both instances working against each other. I would say try deleting ALL of your loadout presets, and recreate them. If problems still persist, write down all your settings that you changed, and delete and recreate the profile.
I know recreate a profile can be a huge pain, but you could also try copying your arma3profile file though it could lead to the same issue.
This is where my profiles are located, just to give you some direction.
C:\Users\Travis\Documents\Arma 3 - Other Profiles\TSgt%20Avery