Intermittent crankcase pressure issues

alright this has to be said you need to start all over pulling the engine and taking it back to the machine shop and have it re honed the cylinders wont reseal unless they are round the rings you used are wrong and because you didn't file fit them to the cylinders they are not round it shows where they were butting together from no ring gap clearance .never saw a set of rings for kb pistons fit out of the box had to fit them all .you need at lease .024 gap when using kb pistons.