Retaking Assessments without adversely affecting SCORM

Hello,

We have built a dozen or so courses now in Storyline v1 and v2 but we are having a problem getting Assessments (Quizzes) to work the way we want them to and maybe someone can advise on how we should go about it.

All our courses operate as follows:

• Course comprises of a series of Training chapters finishing on a single Assessment chapter (i.e. a standard SL Quiz where a Pass is required to complete the course).
• A user should be able to retake the Assessment as many times as they wish to improve their score.
• When a user goes back into the Assessment, they should be presented with the questions again without any previous answers showing (i.e. not in review mode).
• Only improvements in scores should be committed.
• Courses are delivered in SCORM 1.2
• We don't require a "review" mode to Assessments but if the solution ends up with that as an option that is fine.

We use:

• Reporting and Tracking Options > LMS Reporting > Report status to LMS as "Passed/Failed"

The problem we have is as follows:

• If a user goes back into the Assessment a subsequent time, the Assessment enters a review mode rather than asking all questions afresh
• If we force the reset (using Action: Reset results When Timeline starts) then the score is reset to 0% (good) however this inadvertently causes an immediate kickback through SCORM, setting cmi.core.score.min/max/raw to 0/100/0 and cmi.core.lesson_status to go to "failed".  If the user happened to "just go into the Assessment again but not really with the intention of retaking it, then they end up confused as to why their course becomes "failed / 0%" instead of "complete / previous-score%" 

Is there any way I can allow a user to retake the Assessment (and improve their score) but not to have the score sent back through SCORM until AFTER the quiz has been retaken (this is how our in house authoring tool works, and the way I would have considered "more logical").

Thanks,

Chris