Restaurant Etiquette

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Last weekend I was in a restaurant and saw a bottle of wine I had been wanting to taste. It was listed on the wine list as follows:

Chateau Gloria St. Julien 95/96 $72

So I ordered it and asked for the '95. When the check came to the table at the end of the meal the check read:

Gloria '95 $82.50

Given that I was with a group and that I was surprised in the first place that they would sell the 95 and 96 at the same price, and that I didn't feel like arguing I paid the check and left....

But this experience has been gnawing at me. Sure the wine was worth what I paid for it (to me) but most of their wine list listed two years like that and I wonder if they make it a policy to only put the price of the cheaper of the two on the wine list. This seems deceptive to me.

Any thoughts? Have any of y'all seen this in restaurants you've been to?