This may sound like a stupid question but how do I do that?
The question of "How" usually depends on the application and/or version of the app you are using. Some apps will automatically default to anamorphic encoding if the source file was also encoded anamorphically. Others use anmorphic settings if you select a "standards" based output dimension option. In most cases the easiest way to avoid anamorphic output is to simply select the "Custom" dimensions option if available and enter the desired values for width and height. In this case, the encode and display dimensions are set to whatever value you enter and the PAR is reset to 1:1 which means the file plays at the encoded dimensions no matter which type of player is used.
I don't know what/how I made it be different in the first place.
It is most likely that you merely accepted the default options for the encode of a sourced file that was itself anamorphic and which was not automatically cropped for any reason.
I see on the bottom how it has size and actual but the AOL media folks were adamant that it was the wrong size.
These values indicate the current default display dimensions embedded in the file upon opening ("Normal Size") and the current display scaling ("Current Size") which may or may not have been changed by the user since opening the file in QT 7 or similar apps. These values are ignored by QT X and similar apps which rely on an aspect ratio value to scale the width of a display based on its current height.
As to AOL requirements, I am not sure if you are referring to specific upload limitations or some sort of anamorphic conversion issue if the file are transpoded to another compression format (e.g., Flash files) following upload for public display. In either case, exporting the files as non-anamorphic clips at specified dimensions is the same—simply use a "custom" dimension setting that meets their requirements.
