Here is a problem I keep running into. I try to move a bezier handle, either manually or using arrow keys, and the handle on the opposite side of the node is affected. Here is an example:

On the left, I have selected the bezier handle. The result is on the right. I doesn't matter which direction I move it, I get the same result. I would love to find out what I'm doing wrong. Thanks for any help you can give me.