Yes, this exact thing happened to my DD. She did pretty well on all 3 subsections but had the highest score on the composite. In a nutshell, the idea is that it's unusual to score pretty well in multiple areas.

Yes this is common. If child does well in multiple areas then the vQn can be higher. They have a special formular that is used

Yes, the composite score may be higher than the sub scores. It's not an average.

Anyone else have a cumulative CogAT score higher than any of the individual component scores? It doesn’t seem to make sense - been waiting for the letter for more context but nothing so far - just have scores via Parent Vue.