Hi Thomas,
After once you add EXOR step, in side have you added any?
While connecting to EXOR from psa deletion you may chose as success/fail. same from dso activation step to EXOR.
Two situation EXOR need to work.
1. PSA deletion was successes and DSO Activation was failed - EXOR can trigger
2. PSA Deletion was failed and DSO Activation was success - EXOR Can trigger.
Try above two methods and check the results.
Thanks