I want to understand you correctly, you mean that the number of tickets that won in the last round is higher than the number of tickets that win the lambo draw this round?
If this is what you mean, then I would say that this doesn't really matter, it all still boils down to how lucky a participant is, you can win the draw with just 3 ticket, while someone with a million ticket might lose.

I think how this is done is, there are winning tickets and there are losing tickets, but this is not exactly made known to the participants, only the same knows which is a winning  ticket and which is a losing ticket.
And it is possible to hold thousands of losing tickets, and it is also possible to hold the same, or less number of winning tickets.

In the end, the draw mechanics is for a participant to try to hold the highest winning tickets, the user with the highest winning tickets wins the lambo, this is why it's often said, the more ticket you hold, the greater your chances of winning, because in holding more tickets, your chances of holding more winning tickets increases.
But like I said before, it's still possible for an unlucky participant to hold 300,000 tickets, and only 10,000 will be winning tickets, while a lucky participant can hold just 20,000 tickets, and 15,000 of those will be winning tickets, this simply means that the winner of the draw is the participant with 20,000 tickets, instead of the one with 300,000 tickets.

This is the mechanic behind some lottery games I've come accross, and I want to believe that it's the same mechanic that freebitco is using for their lottery system, as well as the for the lambo draw.