This question really piqued my interest and my first thought was "It HAS to be the kubbs per baton ratio!", and I immediately went about researching the games you listed to find out if some teams were basically getting more done with fewer batons.
Unfortunately, the answer seems to be much simpler - Bad Data.
In each of the games you list the names of Team A and Team B are misrepresented in the game info box at the top - take a look at the player initials in the round scores and you can see that they were switched. Before I realized this I did a more in-depth analysis of the first game (game 2 of the finals) and discovered the following as well:
First, there appears to be an innaccuracy in the game record, as it shows the Kubbsicles open with only one base kubb, but the Knockerheads throw two kubbs in turn two, only topple two fields, and in turn three the Kubbsicles again throw 2 fields. My memory is junk, but I think this has to mean that the Kubbsicles opened with 2 base kubbs.
Secondly, there seems to be an error in the calculation of hit percentage, as the game stats show that the Kubbsicles threw 42 batons, but Mark slew the King with baton #5 of round 7 meaning only 41 batons were thrown. This updates the stats to:
Kubbsicles: 41 batons, 12 misses (70.7% hit rate), 40 kubbs toppled (0.976 kubbs/baton)
Knockerheads: 36 batons, 14 misses (61.6% hit rate), 32 kubbs toppled (0.889 kubbs/baton)
In this instance, the winning team had a higher hit rate AND KpB.
...and then I noticed that the names were switched and did a quick check of the other listed games to find the same error.
So, let's see about enacting the following:
Correcting the hit percentage to disgregard batons not thrown during the final turn
Adding a "Kubbs-per-Baton" stat (I just think this would be interesting is all...)
Adding some error checking to the form (without a "rescue" a team can't throw more field kubbs than their opponent had hits in the prior round)
...what can I do to help?