The question still remains - are you (or your mechanic) using OEM DW-1 Honda transmission fluid? If he's using something that isn't designed to be used in the 5AT, which is quite different from any other transmissions out there, I can certainly see the fluid breaking down quicker and being dark. Also, if your mechanic is doing a pressurized machine flush for the trans fluid, that is a BIG no-no with the 5AT. If he's simply doing a drain and fill of the fluid and is using OEM fluid, I have to agree that there is something pretty wrong with your transmission that it's burning the fluid that quickly (black = burned). I don't want to give you any anxiety about it, but your usage does not add up to black fluid after less than a year. There are folks here who didn't even know they needed to change their transmission fluid and it was still redish in color after 100k+ miles.Other than the dark fluid and the flashing D, no issues(knock on wood). Lol I just change it often to prevent any additional problems. Always have a mechanic do flush, so don't know single or more flushes.