When running the command Single Offset Entire Element on a Complex Alignment, it does not always offset properly. Some elements are offset to the right while the others are to the left. See picture below for example.
The green line in this picture is the Offset alignment.
It appears in this situation, the alignment was complexed incorrectly.
Run the Remove Rules command under General Geometry
Recreate the Rule with the Complex By Element command.
Verify that the arrows are pointing in the correct direction when selecting the elements: Notice the arrow is pointing in the opposite direction. In this example, the arrow is pointing in the proper direction.
Rerun the Single Offset Entire Element command and the results should appear correct.