I've had the opportunity to look over some papers relating to Triskelion's efforts to become RWA recognized, and it appears RWA's issue wasn't that the book was or wasn't romance, but format. RWA's guidelines for recognition specify a novel or collection of novellas. Elsewhere they define novellas as 20-40,000 words. Since this book had twenty authors, they feel it is a collection of short stories, and thus not eligible. Trisk, on the other hand, feels that a continuous thread ran through the stories, thus making it essentially a novel, and they refer to the different parts of the book as "chapters" rather than "stories." Again, I haven't read this book, so I'm not in a position to judge which it is.
But the big dealbreaker appears to be the fact that the authors donated their royalties to charity, so it "does not fulfill the requirement that the authors receive payment." This is RWA's wording, but as I said in my last post, I don't see a requirement of this sort in their definition of RWA-recognized publishers. The RWA does specify a "royalty-paying publisher," however, and you could reasonably infer from that they expect the authors to receive payment. If all the authors went into this project with the understanding that they wouldn't receive royalties, as Natalie asserts in the comments below, you could conceivably argue that although Trisk is a royalty-paying publisher, this wasn't a royalty-paying project. Would that be a valid argument against recognition? I really can't say.
There are a lot of questions here, and I don't pretend to know what the answer is. I do hope Triskelion manages to get recognized, though, because from everything I've heard, they're an excellent company.