That does sound a little weird. The only bottle of ac I have ordered so far was 24mg and all pg

. I mixed equal parts ac 24mg all pg and butter rum 24mg 20% vg and it was awesome! Huge TH and excellent vapor production (super flavor also). I vaped all of this at 5 and 6v, never tried it at 3.7v
I think for ac and geoffs blend I prefer 10% vg but 20% vg was really good also. I would just order 20% vg and keep going down until you get the TH you are happy with.