Thanks Marc,
I'd forgotten I was registered here.
Yeah, to the OP, it sounds like you have all the wiring connected correctly, this catches a LOT of people out that install new fluorescent lights.
What happens when you first switch on, is that the mercury in the tubes mix with the gas inside the tubes, now this can be seen as a swirling effect for say the first few minutes from start-up.
You need to run the lamps at full brightness for a while to let all the things inside the tubes mix properly.
Cheers,
Mike.