Hi Fanfare,
your suggestion works if there is no adjustment needed or the cost are all reported to IRS for all 1099B you got. otherwise , considering you have hundreds of transactions, and without auto-import all transcations, you wont be able (or very time consuming) to report those transcations need to have detail trancations on form 8949 and dont need to report on 8949. And once you use auto-import , it will come back to this noisy "aquire date is later than disposition date" problem.
