No, not at all.
I know a few people who got non-immigrant non-dual intent visas while their DV docs were pending.
I think you are misinterpreting what dual intent is. Dual intent visas are H and L. Their holder can have an immigrant or a non-immigrant intent.My question is: At what point will "clear dual intent" manifest itself? when I complete & send DSP-230 or when I submitt I-485 @ CP interview?
I think you are misinterpreting what dual intent is...
Once you file DS-230, you show immigrant intent.