Change the description from:

'Create 5 active subscriptions with each monitoring at least one item.
Call Publish() three-times (#1, #2, and #3).
In a loop of 3 iterations, write a value to all items and then call Publish() three more times (#4, #5, and #6). '
to
'Get maximum number of subscriptions.
Create 5 (or max number if less) active subscriptions (at the same priority) with each monitoring at least one item.
Call Publish() three-times (#1, #2, and #3) (or one less then max number if less then 5).
In a loop of 3 iterations, write a value to all items and then call Publish() three more times (#4, #5, and #6) (or one less then max number if less then 5).'

Change the last line in Expected Result:

'Each subscription must be received before any single subscription is received again.'
to
'Each subscription must be received before any single subscription is received again (subscription are required to be processed in a round robin manner).'

and add line breaks for readability.