Did Xbox Live forget I purchased something?

I only have a few games I have bought off the marketplace. Yet this morning it did not give me the the download again option for one game I bought in May 2012. Yet for all the other games I had bought off the marketplace it did give me that option. I am not sure what is causing this. Maybe its a fluke? Maybe I should contact them? I have no idea. Its not upsetting or anything, I am just curious if this happened to anyone else.