ISU-Installation grouping-Billing sequence control

Hi,

We have recently done installation grouping configuration.

Please find below the screenshot:

Because the distribution relevant flag 'DR' is set, we expect the secondary installations to be non billable till we bill the primary installation.

But we are still able to bill the secondary though the primary is not billed.

Below are the checks we have done on the installations:

1. Grouping type of the Primary Installation is confirmed to be GSIT

2. The secondary installations have the correct primary installation number mentioned in the 'Primary installation' field

3. The secondary installations have the role 'MPRN'

4. The 'Bill Sequence' field of the secondary installations' billing orders are blank

5. The secondary installations' billing orders have status 'Billable'

Is there anything we are missing?

Is it possible that an event or exit is overriding the configurations?

Regards.