Good morning,
The mesh match and reciprocal ratios are very important when you are working with Dual Domain meshes because it tells you how aligned are the elements from one side to the other, when you look at the results and you use the "examine result tool" you are selecting one element, right? The result will be displayed for the middle to the top for the element selected and from the middle to the other side will be the value of the matched element. Ideally you should have the same conclusion whether you select on one side or the other. As the match ratios values decreases the less likely you are to arrive to the same conclusion.
This topic is discussed in detail in the "Learning Autodesk Moldflow Insight" course. If you have not taken this class I will suggest contacting your local Autodesk office to make arrangements to attend the course.
Regards,
Ana Maria