Scale graph

Hi, 

I made a simple scale transition where my image zooms in. I selected the key frames like usual and clicked easy ease. Then I opened the graph editor and I saw a normal red scale curve. But there were no yellow arms. I looked at the lower left corner and all the options were grayed out. When I clicked on the left side key frame nothing happened. No arms appeared. Oddly, when I then clicked on the right side key frame the arms appeared for that side and I could adjust them as normal. And the arms also appeared on the left side, but when I went to move the left side arms, they dispapeared and wouldn't let me move them. This has never happened before and I've spent hours looking online for answers and I've found nothing. It's a scale graph so I can't separate dimensions, and I am in the value graph which is what I need. I do not need to edit the speed graph. How can I get both key frames/both ends of my transition to work in the graph editor?