CX-2's unique ability (Focused and Determined) is not refreshing or reapplying order 66 when targeting the same target.
When attacking the same target the 3rd attack applies order 66 however the 4th, 5th, 6th ect... never reapply or refresh the duration of order 66.
If CX-2 targets another enemy the sequence starts again however the same issue occurs where any attacks on the same target after attack #3 do not reapply or refresh order 66.