Ok I think I know whats wrong here. Under Character Configuration >> Control Settings >> Filters >> Enable target cycling. You want under the option "While weapon is drawn" to have All Enemies, Aggroing Enemies and Duty Specific Enemies checked. This will eliminate the left - right unwanted targeting. Just remember that up - down will always be for your party list. I would also use the Filter Customization under that and set what you like. For me its Triangle = ALL, Circle = Enemies, Square = Friends, X = Party Members. You can switch these on the fly if needed but I don't normally.