請教曾有CCKG second interview 的過來人.....

Monghar

Try your best in your 2nd in.  No pressure!  
Recent years CCKG --> DGJS (girls) very poor results.  Very hard to get into DGJS these days if you have no sibling or old girls points.  Unrelated person is rare but still have chance to DGJS.

So, if you think like this, you will feel better.  If your child is from SC and chances to DGJS still stands.  So, no different.  You still need to work hard.