Just checked, with the Left at TDC the right is traveling down near the bottom of its stroke.
When I time a rephased XS I don't think about the right side at all, until I have set and checked the left side.
Then I check the right side, so far the cam grinders have been good and there have been no problems.
The first one I did I got all tied in knots thinking about what the right side was doing. By ignoring it and setting the cam as per the manual it was no harder than doing a 360 motor and its works out fine (but always check).