For future Jams, it should be clearly stated that submissions be made during the jam period. The rules for this jam opened the floodgates for abuse.
Because there was no official start date, and it was stated casually that "You'll have plenty of time to work on your game," there was no rule preventing people from submitting previously made games.
The whole point of a game jam is to make a game within a set period of time.
Second, because the only rule regarding teams are that "teams are allowed." This allows teams of 50 to 100 people to submit previously published games that had months of cultivation and polish.
Is an entry I'm playing made within a week, 2 weeks, 2 months? The ambiguity makes it impossible to accurately determine a deserving winner.
I hope that in the future, more careful consideration is made to keep the jam fair and competitive.