incorrect order of method execution when assertions are used

Am using test Ng:
following is the code:
package p1;

import org.testng.annotations.Test;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.AfterMethod;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.AfterClass;
import org.testng.annotations.BeforeTest;
import org.testng.annotations.AfterTest;
import org.testng.annotations.BeforeSuite;
import org.testng.annotations.AfterSuite;

public class annotationzz {
@Test
public void f() {
System.out.println("am test f-@Test");
}
@BeforeMethod
public void beforeMethod() {
System.out.println("am before each test-@BeforeMethod");
}

@AfterMethod
public void afterMethod() {
System.out.println("am after each test-@AfterMethod");
}

@BeforeClass
public void beforeClass() {
System.out.println("am before f-1st-@BeforeClass");
}

@AfterClass
public void afterClass() {
System.out.println("am after all-end- @AfterClass");
}

@BeforeTest
public void beforeTest() {
System.out.println("am before f-@BeforeTest");
}

@AfterTest
public void afterTest() {
System.out.println("am after f-@AfterTest");
}

@BeforeSuite
public void beforeSuite() {
System.out.println("start-@BeforeSuite");
}

@AfterSuite
public void afterSuite() {
System.out.println("end-@AfterSuite");
}

}


Results i get is this order:
--------------------------
start-@BeforeSuite
am before f-@BeforeTest
am before f-1st-@BeforeClass
am before each test-@BeforeMethod
am test f-@Test
am after each test-@AfterMethod
am after all-end- @AfterClass
am after f-@AfterTest
PASSED: f
End-@AfterSuite

Query:
-----------
Why is @BeforeClass executing between @BeforeTest,@BeforeMethod?
"BeforeClass-The annotated method will be run only once before the first test method in the current class is invoked."
So it should be executed before @BeforeTest,@BeforeMethod. What is the logic here ?