Not sure if I am on the same page, but it might be worth checking to see if 'Force New Attempt' is set to 'Yes' in the Scorm settings in Moodle. If it is, then each attempt will be considered as complete and re-visits will be forced as a new attempt. I think...! This from the help:
"This setting hides the "Start new attempt" checkbox and prevents review mode.
SCORM allows a student to return to the same attempt at any point and a new attempt is not possible unless the previous attempt has been set as "completed", "passed" or "failed". If the SCORM package does not do this, the student will always re-enter the same attempt."