I think that the "others" section is a bug... The others teams are there.
canadian, about the Portuguese league, it's plain simple: In 99, after both EA and Gremlin released their games with the portuguese league, the Players Association (FUTEPRO) make all the racket they could do, beacuse they didn't have the right to use the names and so on. But that also carried the national team away...
The Portuguese League isn't there, beacuse the players aren't affiliated with FIFPro, and the FPF don't have a contract with EA.