Well then, since the FAQ implies that WIS follows the MLB rules for tiebreakers (from the Baseball-Reference, the last paragraph explains the tie-breaker I think in this situation):
Scenario #7: There is a two-way tie for highest winning percentage among Division winners and a tiebreaker is required to determine home field advantage in the Division Series.
If one of the Division winners tied for the highest winning percentage is from the same Division as the Wild Card:
The Division winner from the same Division as the Wild Card cannot play the Wild Card in the Division Series. The other Division winner tied for the highest winning percentage plays the Wild Card.
If neither Division winner tied for the highest winning percentage is from the same Division as the Wild Card:
A tiebreaker system will be used to determine which Division winner with the best record plays the Wild Card.
The first tiebreaker will be head-to-head competition between the two Clubs during the championship season. If the Clubs remain tied, then the tied Clubs with the higher winning percentage in intradivision games during the championship season. If the Clubs remain tied, then the tied Club with the higher winning percentage in intraleague games during the championship season. If the Clubs remain tied, then the tied Club with the higher winning percentage in the last half of intraleague games during the championship season. If the Clubs remain tied, then the tied Club with the higher winning percentage in the last half plus one of intraleague games during the championship season. This process will be followed game-by-game until the tie is broken.