There are anyone experiencing this same problem? To me, it seems to be a Unity Editor's bug but before sending a report, I'm trying to understand what is happening. I searched and didn't find anything related to. In my scene I have multiple screens from a UI (a main menu with submenus). But everytime I try to change the keyframes of one property, suddenly appears other properties with some keyframes and some keyframes too in properties that already exist. See the screenshot to understand better. From the first to the second print, I just tried to select a property. Then suddenly the SizeDelta.x properties appeared with those keyframes and the Position.z properties got new keyframes, as you can see, and the property i tried to select got deselected. From the second to the third print, I just moved the playhead and selected a property, and what happened can be seen in the image. PS.: I'm using Unity 4.6.2p1. PS2.: I'm still having the issue of getting the project dirty because of a driven rectTransform.