Some variants have incorrect genotype in the result.
Example with rs2235544:
23andme CSV: CC
GeneCodex result: AA
More SNPs: rs1801282 (CC vs CG), rs7754840 (CG vs CC)
https://snpedia.com/index.php/Orientation
https://snpedia.com/index.php/Ambiguous_flip
Not sure it can be fixed.