Adobe Media Encoder Renders incorrectly from AE

Media Encoder is rendering a full res 1280x720 comp in the upper right corner of the input and output. What's the deal?? I have tried everything I can think of to correct this. It happens randomly but now seems permanent. I have tried different versions of AME, but the problem will not resolve.

Can anyone tell me what is going wrong? I can't reach Adobe support without telling them it's an account issue in order to be sent to technical support.