The Grade step progression is getting checked automatically

Summary

The Grade step progression is getting defaulted to Y automatically even after we sent N through HDL

Content

Problem Summary 
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The Grade step progression is getting update automatically 

Problem Description 
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As per our observation in all environments the Grade step progression is getting updated to Yes after the HCM schedule process "Run Convert Pending Workers Automatically Process" runs. 

Steps that we did. 
1) Did an Applicant HDL , were the GspEligibilityFlag value in the Worker.dat file was set to N 
2) Next did an HIRE HDL , were the GspEligibilityFlag value in the Worker.dat file was set to N