Need help on this problem.

Around a year ago I played a map called Estate Mansion, I liked it. Well I downloaded the map, played it, etc etc. But about 6 months ago when I went to play on the map, it brought up one of my other maps. Well I did everything I could (like go through every map I had, looked it up online, looked it up on Bungie.net, looked up the gamer-tag that created the map, and I never had a single bit of luck. So what I was wondering was if anybody knew another way to find this map besides everything I’ve already tried.

Thanks.