have you tried to refresh?
the thing doesn't get refreshed unless someone fight u or u manually press the refresh *on. And according to some of the points ppl have, they haven't been on the thing for more than 0-3 days. Which means the time when the "snapshot" was taken, there might have only been 18. And if you never refreshed since, it's going to remain that way.

I wonder if it have anything to do with your power, how many of the 38 have higher power than you (and I mean your power on the ranking, not you current power)?

No I mean your power that is on the power ranking, i.e. your maximal power ever (as opposed to real team power)

I'm fairly sure that's how the placed the order of people at the start of this thing for people who already qualified. It is possible that for new entrants(new qualification) you are "pre-qualified) for a certain position despite not being on the ranking based on your power. So if, for example, 20 of the people have lower power than you, you don't need to fight them before going for the higher ones. Note that this may or may not be intended.

which is higher th*l except 2 of the 10 people I can see on that ranking and maybe some more higher in the rankings, might have something to do with it... Just my guess.