Does anyone have any insight on this situation?

I just got back from my ds school conferences - he is in 4th grad. He is in the G&T program and has been since 2nd grade. For entrance he scored a FSIQ of 141 (VCI - 125, PRI - 143, WMI - 146, PSI - 103)on the WISC IV test. His strong areas have always been math while he has always scored lower in the verbal areas. I just received his MAPS scores which were
MAPS
Math: 233 (99%)
Reading: 222 (96%)

Then on his COGAT he received
Quantitative: 125!!!! (?%)
Verbal: 150 (99%)
Non Verbal: 130 (which he normally does very well on)

He also took the NJ Ask at the end of last year and scored:
Quantitative: 300 (Advanced Proficient)
Verbal: 228 (Proficient)

His teacher and G&T teacher were flabbergasted as was I. Can someone tell me what this means? Can the COGAT have skewed results? I am totally stumped.