Labels is multiple value field in Jira. There could be many combinations of labels for any issue. eazyBI calculated members in this case will work as if any of the labels as selected.
If you would like to count issues with all labels you can consider two options - use Javascript or MDX calculations for complex cases.
JavaScript might need more setup and maintenance, but it would work faster.
There are several options on how to build those dimensions based on labels:
When importing alternate labels, you can use the additional parameter csv_dimension = true to the definition to import additional dimensions with all the label combinations. CSV dimension will work similarly to single value selection. You can select any combination and eazyBI will give you a unique count of issues with the needed combinations of labels.
This community topic offers a solution to define a new dimension based on explicit label combinations:
You can also use MDX calculation to get the count of issues with a specified label combination. For example, this community topic includes formula counting issues with all the selected level combinations in the report: