SYMPTOM:
A user has a grid report that has several attributes both in the rows and in the page-by section. A metric on the report has a "Replace with Text" threshold applied. When a custom subtotal is added and applied "Across Levels", the threshold on the metric no longer works correctly.
STEPS TO REPRODUCE:


CAUSE:
This is by design. The threshold does not apply to the values from a custom subtotal. This behavior can be changed through the Advanced Threshold editor, but that editor is not available in Strategy Developer.
WORKAROUND:
The user should run the report in Strategy Web, which has an Advanced Threshold editor:

From here, the user can apply the threshold to the subtotal values as shown in the image below:

Save and Close the report and re-open it in Strategy Developer. The report should now appear correctly.