Huh, that is strange. I just checked my 8949, and it does appear to be properly adjusting my cost basis for all of my ESPP's (code B, column f, as you said).
The only strange thing is the 8949 only fits 6 short term transactions (all of mine are short term) and I have like 35.. I'm not sure where the rest flow to? Maybe you're not required to list them all in the 8949, I don't know.
