It's unclear whether you're claiming 1. the vanilla ice cream is sometimes kept in a separate chiller must nearer the entrance and this obviously made-up story is perfectly true, 2. at least some stores exist where the vanilla ice cream (and only the vanilla) is kept in a separate chiller must nearer the entrance, or 3. the vanilla being kept by itself in a separate chiller has elements of plausibility, and can not be dismissed out of hand, even though it's possible that this specific set-up has never existed in any actual store in real life, ever. Which is it?