On the web file browser I found some gametypes and clicked “send to Xbox”. The problem is that the game types are repeatedly being sent to my Xbox, So I now have multiple copies of those same gametypes on my Xbox.
Same problem here
I’m having the same problem too. 
Here as well. I’m just stocking the downloads now that it’s happened over 100 times. Gonna delete them all at once when I find a fix and redownload my maps.
I’ve heard that clearing your Active Transfers on the Halo Waypoint website will stop the file downloading infinitely.
On the nav bar, choose Career > File Share > Xbox Downloads and click Clear Download Queue
Please let me know if this works.
Thank you to those of you reporting this issue. We’re currently investigating but don’t have a fix in place yet. For now, try the troubleshooting tip suggested by The Little Moa and hopefully that will temporarily stop the download loop.
> On the nav bar, choose Career > File Share > Xbox Downloads and click Clear Download Queue
We’ve deployed a fix that should resolve this issue, please let us know if you’re still experiencing problems.
I hit “Send to Xbox” and I never see them.
> I hit “Send to Xbox” and I never see them.
First of all, please do not necropost in old threads. If you have a problem in the future, please start a new thread. With that said, have you tried checking your active transfers from the in-game File Browser? Files won’t download if you are searching for a game in Matchmaking. 
If that doesn’t solve your issue, PhinikY, feel free to start a new, relevant thread.
Thanks