ZonedDateTime would use same timezone of winter when summer daylight saving?

Question

ZonedDateTime zdt = ZonedDateTime.of(2015, 10, 18, 0, 30, 0, 0,
    ZoneId.of("America/Sao_Paulo")); 
System.out.println(zdt); // 2015-10-18T01:30-02:00[America/Sao_Paulo]

You can see the hour is 1 while we set the hour as 0, and timezone is UTC-02:00 while daylight saving timezone should be UTC-03:00.

But here is a different example:

ZonedDateTime zdt = ZonedDateTime.of(2015, 10, 18, 0, 30, 0, 0,
    ZoneId.of("America/Los_Angeles"));
System.out.println(zdt); //2015-10-18T00:30-07:00[America/Los_Angeles]

You can see the daylight saving timezone is UTC-07:00 and the hour is 0 as we set.

Why are they different?