Wait, is the silver actually damaged or just shiny now? @the_hayden has a point about tarnish not being real patina. Maybe it looks weird because you're just used to seeing it dirty.
That's actually a common misunderstanding with antique silver. The dark tarnish isn't the original patina, it's just built up sulfur from the air. A real patina on something like bronze is a stable, colored surface layer from age. A good cleaner should have just removed the tarnish, not any actual plating or engraving detail.