Can't change key frames?

I’m having a weird problem where every time I try to change a pose in a key frame, the key frame right after it changes to that exact same pose, effectively preventing me from making any changes to keyframes. I made sure that the animate button is turned on…

The one work around I’ve found is that if I want to change any key frames, if I put a junk key frame between the two poses I actually want to change, the junk key frame copies the the pose of the first key frame, but the 3rd keyframe is safe. The problem is that I have to do this anytime I want to move ANYTHING and it’s extremely frustrating and time consuming.

Try going into the preferences and on the “Camera” tab uncheck “Paste/Drag & Drop add keyframes at beginning and end”.