Are you continuing to blow transmission case seals out one right behind the other? Or were they leaking all along or did you damage them doing some specific?
If you're blowing them out maybe you should look for the root cause of the problem... transmission case seals should not be under any pressure. If they are, you have one of two problems and possibly both. The vent line that comes off of the case to the right of the reed cage mounting boss is the transmission vent. Dirtdobbers LOVE to try and build a nest in the end of that piece of tubing and there isn't anything to stop them, it's just a piece of vent tube that goes up above the frame somewhere. Make sure the end isn't blocked because as the transmission heats up, the air inside it expands and it has to have somewhere to go otherwise it will pressurize the seals until it finds a weak one and blows it out.
Also, the crankseal on the clutch side COULD be going bad. Usually they suck transmission fluid in and burn it in the engine but it's possible the seal is allowing crank pressure out without sucking transmission fluid in and doing the same thing to your transmission case, pressurizing it. You might want to consider a leak down test to make sure you don't have a crank seal problem.