Welcome, timothe53!
Typically, the very first vaccinations a kitten gets are given twice a few weeks apart. The first vaccination 'primes' the immune system and the second one confers full immunity. After that, vaccinations are given on a schedule, but typically a year or more apart. Is your cat a kitten?
Where are you located? Not sure what might be mandatory in your area. I know laws/regulations/practice differs between the US and Canada, so knowing where you are would make it easier to answer your questions about the clinic procedures...