Hey, dwasifar, I hope I didn't throw a "monkey wrench" into your investigation. For the record, I'm quite fond of rosewood for bridges, and I don't know for certain that's rosewood. In the past, Guild has used ebony on its F-50R models, but they've used rosewood for the F-512 bridge so the mixing of woods on similar models is not a new thing. So, I guess I'm saying that even if they made a mistake on your D-55, I'm not sure that it matters at all or that Guild will be bound by the specs to do anything about it. More to the point, maybe you don't want them to do anything about it if you love the guitar. I wouldn't. The leeching of color on the saddle and the pins does not necessarily mean that they dyed the bridge or anything unnatural.
Anyway, good luck in the discussions. We'll be interested to see what you find out.