Yeah, I remember that now and my reaction to the way its worded is the same now as then. It seems to imply that James (the Lord's brother and biblical author) was one of the Twelve.
Also, I don't think its all that uncommon for someone to refer to "the apostle Peter" or "the apostle John". If people avoid the term "apostle" in reference to James it's most likely because there's more than one James and so they are typically referenced in a manner that properly differentiates them from each other.
Lastly, if it had been the Holy Spirit quashing the use of "apostle" in reference to James, it seems that Galatians 1:19 would read differently than it does.
So, to be clear, I have no problem calling James an apostle, per se, so long as doing so does not leave the impression that he held the same office as that of the Twelve, who will sit on thrones ruling over the twelve tribes of Israel in the New Jerusalem.