Your internet connection was probably not strong enough and you had package loss throughout the download, torrents check all the packages and make sure nothing is missing before telling you the download is complete, compared to a regular download that does nothing of such. Downloading things with the regular download if your internet connection is not that stable could cause issues like these ones.
The download provided is not broken at all, it's the very same tons of users download each day.
Glad you sorted things out however.