Also, they made Joida AFTER Burning Incense. If they would have right at the beginning called it an offering, which it was, then Joida would have had to be different.
But they didn't. If it was made to be an offering, it would have had the identifier "Offering" on it like all the other Priests offerings. Since it is not an offering, the Playtesters didn't have to worry about Joiada abusing it.
Also, what is the definition of Offering in the REG? I thought it had to do with being offered on the Altar of Burnt Offering, as has been suggested in this thread by Arch Angel. Also, I remember this coming up before with that explanation given, but I can't find the thread (it's probably gone...it was awhile ago).