It appears it was done on purpose, or unless they forgot to match the top of the ports? I mean all the lower parts of the sleeve were ground on to match up, same with the intake porting. Maybe someone got in a rush at fmf and didn't do the job right? It just doesn't make sense to me as ports in the sleeve don't even appear to be as large as the ones in this other stock cylinder.
The bike did run great and faster than a stocker for sure. But I won't be grinding on anything, I have an expert engine builder here Jerry Hall that I'm going to take it to for his opinion.