Ajax Scroller and random order

When I select 'random' order of ajax scroller always on startig is same order. I think order is random, but always same. Is that my mistake or that is not really random?

It is same on the same page. If you load some other page it will be different. It is also different for different users (IP addresses) and for different dates.

OK, now is clear (for me). I think this is a good solution.
Thnx.