hee, hee, you're not alone....I did the same thing too!
Once you've turned the tip around, squeeze but don't move your tip so that you get the bottom, wider part of the leaf going and then gently pull away so that you get that sharp, narrow point on the top...sometimes if your buttercream isn't the right consistency you may not get the point exactly right but it still looks like a leaf.
Happy Leaf-making!
When I first used this tip, I started the wrong way too! haha.. What a magnificant thing it was when I figured out to use it the other way!
Ditto! I couldn't figure it out either. 
Diane
THANK YOU - don't know why I didn't try it that way!
NOW IT WORKS!!!!
Ah its the only tip I use for my leaves, I love it. And yes we all start using the wrong way and wonder what the heck have we done. Good luck with it.
In class I tell the students it is our bird beak tip and when they use it to think about the bird being a hungry bird with his mouth open. (And yes I make a little mouth motion with my hand.) Sometimes relating it to something else, helps us remember which way to use it. If the birds mouth is up and down, it works just fine. 
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