Admissions Test registration, new or old UCAS ID

I'm currently a bit confused whether my TSA registration was properly done, I applied last year through UCAS, and I am applying again this year and registered for the TSA with the application ID that was on my application 2014 form/website/thingymajingy but I've received correspondence from all universities I am applying to, and they all use my old UCAS ID (The same one as last year).

Am I still registered properly for the TSA? Or do I need to call up the exam centre asap and try to get them to change it to the old number?

I have already contacted the college I am applying to ask them what to do, just wondering if anyone ease my worries ^^