I agree that it was poor wine service for the waitress to pour the entire bottle out on the first serve.
Did this impact your decision to buy a second bottle?
In bobbyc's case, it appears that the server deliberately filled up the other four glasses and gave a short pour to bobbyc in order to sell a second bottle. In this case, it doesn't appear to be as blatant. You could chalk it up to poor training.
What I am curious about is whether you think that you might not have ordered that second bottle, but for the server's actions.
I have been at some restaurants where I notice some aggressive bottle pouring before the main course is served. I suspect they do that in order for you to run out of wine as you begin the main course, thereby resulting in the purchase of a second bottle. If you run out of wine when everyone is finishing their meal, you are less likely to go ahead and spring for another bottle.