There is no right or wrong here, just what people found interesting.
Maybe people found the idea of bad machine translation intriguing enough to vote. Maybe those submissions you mention had some charm that made them popular despite their limititations. Your guess is as good as mine.
I understand your worked hard on your entry and you want what feels "right".
But picking a translation over another is fundamentally dictacted by taste, which is subjective, and thus rarely "right" in the first place.
And framing the contest as a competition would create a toxic tension between the different teams, damaging collaboration which is one of the three goals of the jam.
And finally because the other two goals of the jam are creativity and discovery. Giving visibility to odd, unexpected, original entries is at the core of the whole event.
So to loop bacl to what I said before, voting went exactly as I expected, surfacing entries that aren't necessarily The Best of the Best but more humbly something intriguing, worth discussing or simply funny..
This said, I see that the "voting" framework created tensions and false expectations in some. Most participants do not seem to mind, but I'll make sure to study something better for the future.
After all, we're all here for having fun.