Why do I have to redo my CLEARANCE for a GS-12 job when I just got a CLEARANCE in 2015 with a Government Contractor company while working in Afghanistan?
Different level of clearance? Different agency? There’s not enough information for us to answer your question.
This is not unusual, especially when jumping from contractor to civil service or from agency to agency.
This thing called reciprocity is rarely as simple as it should be. The close date of your BI may also be a factor. I too had a fresh TS BI only 18 months old, new contract different client, they crossed me over as Secret, not TS and then started a brand new BI for TS. That took a solid year.