Purchasing Alert "Blanket Notification Released" provides results for only one Operating Unit

I did setup the Purchasing Alert "Blanket Notification released" using Doc ID 287337.1

I have two Operating Units (Canada and United States) Both have BPAs with Notification control with

I set up the two parameters that indicate the Operating Unit (MO: Default Operating Unit, and Alert Details > Installations > Operating Unit

When running the alert using the scheduler, the following happens:

1. when I set the parameters to 'United States' BPAs for the United States OU are selected

2. When I set the parameters to "Canada', the query still selects BPAs for the United States OU

Did I miss some setup item?

Thanks!