T levels FLUCTUATE over time. Smoking also interferes with the metabolization of some drugs/hormones (estradiol, progesterone, etc.) taken ORALLY, reducing concentration in blood BUT if smoking habits remained the same, this shouldn't have affected results.
More important is have you seen a resurgence in masculinization, less feminization? Isn't that what REALLY counts in the end? Like thicker hair growth, scalp hair loss, increase in libido/erections, skin more oily and less soft, breasts shrinking, less fat distribution?
If you take spironolactone or cyproterone acetate, these also block part of the measured T so tests don't show everything that is happening in the body.