To be honest, I'd return them both. I know it's not what you want to hear, but -
The kenyi are simply too aggressive for this size of tank, and will cause problems. This is not a maybe - this is a certainty. Crabro's (bumblebees) are the largest mbuna, and pretty aggressive themselves, also not suitable for a 33 gallon. How big is your kenyi, if it's very small then it's still to early to determine gender.
Species worth considering for your tank are:
Pseudotropheus Saulosi
Labidochromis Caeruleus
Iodotropheus Sprengerae
Maylandia Estherae (Red Zebra)
My first mbuna tank was 33 gallons. I learnt the hard way, and am only trying to save you the trouble.
The more heavily stocked the tank is, the worse of those barbs will be. In a tank of say, only Labidochromis Caeruleus, the barbs would do fine, but in a mixed mbuna community, they wouldnt stand much of a chance.
Don't let your fish fool you, the aggression at younger ages that we purchase them at are nothing compared to when they mature.