Currently when you change the IN and OUT point of the responsive design - time the keyframes don't stay in place, get stretched out. When you try to move them back they behave very weirdly like it's skipping spaces in time. When you try to select them for a second time to move them they freeze can't move the keyframes.
To fix I have to copy and paste the keyframes 1 at a time cuz selecting 2 doesn't work. Unless you use a tool like motion 4 to copy the keyframes.