No, you have got it all right. It is also heavier than the long sword. Is there any reason for using the bastard sword instead of the long sword? No.
Why is it like this? In AD&D, the bastard sword can be used both as a one-handed and a two-handed weapon, dealing 1D8 and 2D4 damage respectively. BioWare decided to have it do 2D4 as a single-handed weapon and I when I made this mod, I altered it to 1D8. Now, things have changed a bit since then. While the purpose of this mod is still to correct the various AD&D sources that the game draws upon, I do not necessarily want everything to be the same. Such as the bastard sword. I am either going to make it both single-handed and two-handed, or change it back to 2D4, since it pointless to have a weapon in the game that is essentially useless. (Scimitars? They are there because of the druids.)