When I search for Base fares from MIL to GRU like this:

I get 248 results:
None of the results shows AD fare SLEAXZ5E (R$732,02). But it shows base fares more expensive than that one.
When I search for the same previous data, just adding the info of the base fare SLEAXZ5E separately, the system shows it without any problem:
My question is, I know the system shows a maximum of 250 results to searches that don't specify airlines. Why it isn't showing the lowest one first? For example, the AD base fare is lower than AT base fare. There is a sequence of airlines it searches first? That's why it didn't show AD results? Or this is random?