1. Uncheck Table I-A2 ( Resize on upload ). This will simply copy the uploaded file to the file being used for ‘fullsize’ displays.
2. There is only one ‘small’ image file, used for thumbnails, widget thumbnails, coverphotos and thumbnail popups. They are created to fit the largest size specified. So, do not make the coverphotos or the thumbnail popups much larger than the thumbnails to avoid loading images that are much bigger than needed. Ref: Table I-C1, I-C1a, I-C8, I-D5, I-D6, I-F2,4,6,8,10,12. After changing the sizes that leads to a reason for it ( also when the new calculated size is smaller than before ), you will be asked to run Table VIII-A4 to regenerate the thumbnail image files.