Have Aetna miscalculated my reimbursement?

Aetna HSA plan $3000 Out of network deductible $6000 Out of network out of pocket max

I regularly visit a certain OON provider who charges $325 per visit which I pay up front and submit for reimbursement. Each visit has the identical CPT code, duration, and details.

For almost all the visits they are taking $300 as the “recognized charge” per visit and now that I have met the deductible and out of pocket maximum I am only left with $25 unreimbursed per visit.

But Aetna began decrementing their deductible of $3000 using different charges per visit to their advantage:

First they applied two visits at $300/visit (2 x 300) out of the total $325 cost to the deductible ie. $600 total.

For another six visits, they took $275 as the “recognized charge” per visit and applied a further total of 6 x 275 = $1650 to the deductible.

For another six visits, they took $283 as the “recognized charge” and applied that to the deductible in the form of 2×283 + 184 = $750 and then began calculating their remaining responsibility as 70% coinsurance of $283 ie. $255.70 for one visit and then $198.10 per visit.

So it seems like they’ve miscalculated this twice in their favor:

First, they applied $275 and then $283 of each $325 respectively to use up my deductible, rather than $300 from the start.

Then, they paid 70% of $283 as the recognized charge rather than 70% of $300 as the recognized charge leaving me with $126.90 per visit.

Isn’t this wrong? Shouldn’t the recognized charge have been $300 from the start of the plan year?

How would you get this rectified?