Forced Name Change

I just realm and faction transferred my DK from alliance dragonblight to horde rivendare, and upon finisheing both transactions, I logged in, selected my race and "built" my character and selected my name.

However, when trying to log in, I was prompted to once again change my name. I tried to re-enter the same name, or nothing to bypass it, but to no avail. I checked the name before the transfer, then deleted it just before arrival, so the name is taken by the very same character.

Any way I can cancel the second name change and use my first choice?