Yes, I think you do. His performance overall on the Nonverbal subtests is more similar to his performance on the Fluid Reasoning subtests than it is to his verbal performance. Especially since bug search is supposed to be the subtest used in the composite, rather than cancellation.

I should mention that that is a rather dramatic difference between the two PSI subtests. Did your DS or examiner make any comment about that?

...pronounced like the long vowel and first letter of the alphabet...