Have you changed your bag by yourself yet? The first time can be a little nerve wracking...It took me about five times longer than it should have, but I did it, and if your appliance is bothering you, you can to!!!!!!! I'll help you out through posts, if you'd like.
One of the benefits to a two piece system is that the pouch can be switched out at any time. I think some people get 7 day wear time from the wafer, but change the pouch every 3-4 days.
Have you tried to rinse out the pouch with a little water? Not sure, but that might help out the smell for you.