I smoked 30 to 40 filtered RYO a day. I vape 26 mg, and not yet sure of the total amount per day.
smoked as many as I could in a day.Now I vape 24 mg as much as i can in the day.
If I get low and mix it with flavor (say 10 drops of nicotine and 10 drops of flavor) wouldn't that put me at 7mg of nicotine (instead of 14mg/low) because I'm starting out with 14mg and cutting it in half with the flavoring???
Yes, if you mix half flavoring (no nic) to half nicotine, it will half the total mg content of the mixture.
Your question about flavoring, when you mix unflavored nic to flavor, the flavor will be diminished by some amount depending on your ratio.

Smoked 2-3 packs a day. Now I vape 36mg about 2ml a day. Got some 42mg comin tho