I think I get what you are saying.
If OP is worried about a “D” from the 8th grade showing up on her overall transcript (Junior High + HS) and that will look bad, when the rest of their HS grades are fine, I doubt that is going to effect OP.
My kids’ school is a K-12 and yes, I see their middle school grades listed on the HS transcript and never gave it any thought because it’s like asking grad school if they care what your SAT/HS GPA is – they don’t; and some schools specifically ask applicants not to list any achievements prior to UG because they don’t care.