I bottled my first batch this weekend as well, and it was also a hefe (Franziskaner clone), and it too tasted of bananas from what I sampled.
I love the banana taste. Paulaner tastes like bananas to me!
I don't know the answer to your question but good luck!
Greetings from Maine, the home of Shipyard, Allagash, Geary's, Gritty's, and countless other microbreweries.
I got a kit this weekend and now have a Franziskaner Hefe clone brewing!
This site looks awesome!