Those bills are interesting because the numbering machine seems to either be set to strong, or is running out of ink. Very inconsistent printing on those serial numbers. Or maybe it is just the photo?
It is just the photos. I checked them and did a reshoot for you. Thank you for the effort to look at the photo close enough to notice. Oh, that nine does have a bit of a spot on it.
When I buy consecutive banknotes, I expect a discount. If I'm going to buy in volume then it should be worth my while. The only time this rule is upended is when the notes are 75 years old or there's errors, or consecutive radars involved. I also find the idea that consecutive notes = UNC, completely ridiculous too. The notes are often mishandled & lose their topnotch pristine condition quickly.