Hi gmattaker1202.
Missing an easy or medium GMAT question hurts your score much more than missing a hard question.
Meanwhile, the quant and verbal sections of the GMAT begin with medium questions.
So, it looks as if what happened to cause you to score so much lower on quant on this last test is that missed some medium questions, and possibly some easy questions, at the beginning of the quant section, bringing your quant score down significantly.
In contrast, its likely that, on the other quant sections, you missed a question here and there because it was hard. Missing those hard questions, rather than easy or medium questions, allowed you to score much higher.
One way to avoid missing the easy or medium questions at the beginning is to warm up before you take the GMAT, or a practice test, by answering some practice questions, getting into game mode before the test begins rather than during the first questions of the test.
For more insights into how the GMAT is scored, see this post.
How Is the GMAT Exam Scored?