If you say No then your LMS should be interpreting it as a new attempt, not mixing a previous attempt with a new attempt. While we don't offer support for custom LMS implementation, you may want to look at hiring a consultant to assist you who specializes in issues just like yours. We recommend Rustici Software. You can contact them here:
SCORM
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Justin Wilcox
Customer Support Manager
Articulate - Empowering Rapid E-Learning
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