I just purchased and downloaded both Halo Reach map packs and the Fable 3 Understone Quest DLC via xbox.com's marketplace. I got on my Xbox a little later and moved the Understone DLC to download first at the download queue on the dashboard menu, before the first map pack finished. It then began to download from 1% and a couple seconds later went right to 100% and said download complete. Understone being around 200mb didn't believe this to be true, I checked my HDD and as I thought, it wasn't there.
Fustrated while I watched the Reach map packs downloading correctly, I began to troubleshoot. So I re-downloaded the Understone DLC from within the game marketplace on Xbox live this time and the same result. So I went back online to xbox.com, into my account, to download history and added it to the download queue and watched it download the same disfunctional way on my xbox.
In conclusion, the Understone Quest DLC won't download correctly and would love some help. Thank You for reading.