xbox one preload having to reinstall?!?!

i preloaded all last week on my very very slow (1 gig an hour download rate) for about 3 full days, then i go to play it today and it starts downloading again :frowning: when i selected manage game it said it had 35 some odd gigs of content downloaded for the game. hopefully its just a patch. anyone have a fix for this or know what is going on?