Hi Seth and Gina,
I apologize for any trouble! If you are still experiencing this issue, please submit a support ticket to http://support.clickdimensions.com and include the link to your Email Template editors so that we can take a closer look.
please submit a support ticket to http://support.clickdimensions.com and include the link to the editor you are using and we can take a look. Another option is to resize the image outside of the editor if you're in a rush and upload it as the size you want it to be.