I have a Gucci Loves NY boston bag which has the white canvas. I bought it on ebay and have had it authenticated here as well as Saks. I pulled it out of the dustbag today and one whole side of it was pink and its not coming off. Its been stored safely, that's not the problem. Is this a common issue with the white canvas, could the dustbag be staining it (its the light brown dustbag), or should I be concerned its not real? Is there something I can do to prevent this? HELP PLEASE!