TestNg.xml File not running in Class sequence order

Xml Code

TestNg.xml File not running in Class sequence order

All test cases running parallel

Like this way

test1 from MyTests1 class test3 from MyTests2 class test2 from MyTests1 class test4 from MyTests2 class

On My 1st Class I have 13 test cases On My 2st Class I have 5 test cases On My 3st Class I have 3 test cases

So sequence suppose to be 1st 13 then 5 then last 3 but all are running parallel