No there were 2 different Vilplumes. The 1st edition all had weakness to :fighting: while the unlimited had
weakness to :fire:. The Ruling then was play as written.
Personally I would prefer that the do not errata this error. A Colorless Dialga would be a good tech in a :Metal As there are a lot of Electric Pokemon like Ampharos and Manetric that will probably get a lot of play at states, and are resistannt against Metal attacks, The Colrless Dialga will also be usefull against dragons like the Flygon/Flygon X that we should get in the next set, as they are weak to Colorless attacks, and will most likely get a lot of play in Battle Roads and Nationals/World Championships. I realize that the game designers did not intend for this to happen but as it has it should be allowed to be played as printed. Now if both the RH and the Regular were colorless then I could see having to errata the card, but with the correct version being the more easy go get version, I feel they should allow both versions to be used in Preimere event play.
Lots of pokemon have dual types available in the current game, One more will not hurt the game at all.