That's incorrect. In your original comment you referred to "a positive net result", which the utilitarian will always prefer by definition. Perhaps you are confusing utility with efficiency?
That is the heart of our confusion here. You are comparing it to a neutral state. Yes, a utilitarian would prefer any positive outcome to that. However, I was implying that there was another path that would have resulted in an even more positive result but through inefficiency we were left with a lesser but still positive result. That waste of resources like time and money is equivalent to a waste of utility that a utilitarian would obviously oppose.
Ah, the old "I intended the exact opposite of what I said" ploy.