Okay. That is odd. I've never given the SAGES-2, but it would be highly unusual for the protocol to include reviewing the errors with a child, unless the examiner was attempting to test the limits (obviously not very discreetly), perhaps to see if the errors resulted from carelessness, or, as you say, not taking the test very seriously.
The other possibility (and I've seen this one happen with my own child) is that the examiner was not very subtle about how he/she was scoring the items. After coming home from a screening for 1st early entry, my #1 sat down and made up a test for some imaginary students, complete with answer boxes, 0s, and 1s at the end of each line. Clearly, that examiner did not realize that her examinee could see everything she was doing.