Its correct though might seem weird. Every Idena user on a planet needs to appear online at the same time and solve 5 flips in less than 2 minutes in order to prove their uniqueness. Consider it as a global online party.
Yeah, it felt strange for a while, but now when i've had time to think about it, it makes sense. It was just a new approach and hard to get my head around it first. Luckily i live in a timezone that allows me to participate without any problems.