Other mistake: When Phoebe calls Ray from the police station, Ray says the firehouse is now a Starbucks, but during the end credit scenes Winston is standing in the firehouse and Ecto 1 follows him.
Suggested correction: Ray was being sarcastic. A common joke in NY is that every time a business closes, the location becomes a Starbucks.
Suggested correction: This mistake has already been corrected. Starbucks is often used as a shorthand joke about general gentrification, companies going out of business, company over-exposure, etc. (Which is kinda based on reality. Ex. In my hometown there are literally four Starbucks locations over a 5-mile stretch of road, at least one of which I believe took over an old store that closed down. It's utterly insane.) Ray isn't being literal when he says the firehouse is a Starbucks - he's just making a sarcastic joke about how it's closed down.
