I assmue the statements should read

f (valuesWritten < items[0].RevisedQueueSize && valuesReceived <valuesWritten ) addError( "Received less DataChanges (" + valuesReceived + ") than values written (" + valuesWritten + ") and less than the QueueSize of the MonitoredItem (" + items[0].RevisedQueueSize + ")." ); result = false;
iif (valuesWritten >= items[0].RevisedQueueSize && valuesReceived > items[0].RevisedQueueSize ) addError( "Received less DataChanges (" + valuesReceived + ") than values written (" + valuesWritten + ") but more than the RevisedQueueSize of the MonitoredItem (" + items[0].RevisedQueueSize + ")." ); result = false;

I

If the server returns more values than the revised QueueSize, the error should always be thrown (regardless of the number of written values).

So the first part of the second statement should be removed and (as suggested) - '>=' should be replaced with '>' in the second part.

If the server returns more values than the revised QueueSize of the MonitoredItem, then the error should always be thrown (regardless of the number of written values).
Also updated the text accordingly.