Bay (11-14-1) took a 1-0 lead in the 10th minute at Shell Energy Stadium when a free kick was redirected into the goal by a Houston defender.
Barbara Olivieri responded four minutes later for the Dash (5-16-5), slipping behind the defense and finishing into the near-post corner.
Kundananji gave Bay the lead again in the 21st minute, pouncing on a loose ball off a corner kick.
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Avery Patterson brought it level right as the second half kicked off, slipping her shot into the left corner after beating her defender in the box.
Kundananji scored her second in the 54th minute on a solo effort and now has five goals and four assists this season.
The Dash finished in last place.