I believe you were sent a wiper and a seal if you were sent what's shown in your picture. A wiper will likely have no spring while a seal has a spring to keep the seal tighter to the shaft. I believe the wiper goes in first. It seems that you would want to wipe the shaft to keep contaminates form the sealing surface. Could leak be coming around the seal rather than through it? I've seen that happen. How is your shaft? A slight burr can wreck a seal and wiper on installation.
Also, check to see if you have the venting washer on the PS pump. A proper washer will have a groove on one side, allowing the reserve to be open to atmosphere to allow for thermal expansion. I've seen rubber stoppers and flat washers used, and they both allow internal pressure to build forcing fluid out where it would not normally leak.
If they sent you two wipers by mistake, you will have a leak.
Barry Wolk
Farmington Hills, MI
C5681126