Folders keep moving around when trying to move an app into it

I'm a huge fan of organizing my iPhone/iPad apps into folders, but there's an annoying problem that sometimes happens when I try to move an app into the folder. Sometimes the folder keeps moving around whenever I drag the app over it, making it impossible to actually deposit the app into the folder. The only workaround I've found is to move the folder all the way to the right--on it's own separate screen--and then go back to the app and drag it all the way over to the folder. Once I get the app into the folder there, I have to then drag the folder back onto the screen that I wanted it to be on in the first place.

Please tell me there's a better way? This is annoying!