Best advice I can give is to dig deep into finances. See if credit karma shows unpaid bills, and get in a repayment plan. The two biggest things stopping clearances will be recreational drug use that is too current and financial difficulties making you vulnerable to either blackmail or bribes. If you have excellent credit now, how long has it been excellent? Is there a past habit of declaring bankruptcies? Past alcohol treatment issues? Multiple or really any number of arrests? Think whole person concept. Small dings in each area can add up to being judged “wanting.” I am only guessing but I would think what is slowing you down would be whatever info was left behind regarding your Poly. They are free to capture the results as they see fit with little chance you ever see it. So they can word denials quite harshly. It would paint you in a negative light. But, having achieved the recent clearance tells me, regardless what they wrote, you are now mitigating it with time. That is a good thing for you. If the State dept is a Secret clearance and credit is excellence I see no issues indicated, but you are the best judge there. If you can baby step it up for the clearances that too can grow your confidence. With my client we have two levels of TS. One requires Poly the other does not. It is the same background investigation every step of the way except for the added Poly on one. If I can get a guy cleared Secret and he had quite a few past issues, I always advise them to wait a year or 2 showing they mitigated the behavior. Then apply for the TS. That will still take another year. If they can achieve that they know they are deemed squeaky clean (that is my own clearance level; kind of made up, but you get the picture). I tell them to hold there for another year and then apply for the higher clearance with Poly. This gives another year of mitigation to show they moved beyond bad times. From there it is between them and the Poly. As long as they are honest and have been honest from the first SF86…all should be fine.
Hopefully I alleviated some of the introspection on the BC poly. It is a very high bar. Met several who “failed,” or failed to progress as some are told.