@AlfaElephant I'm not completely sure tbh. I havent had it do that to me. You can try also forcing a recheck on the first one and see if there was an error or corrupted chunk in the download. If you hit play on the second torrent it will download only the missing data. This is fine for the .nfo file but it might cause an issue with the rar file if the data is indeed different.
If you decide to download the data from the second torrent I would make a copy of the file first just incase it messes up the original seed.