The Size is the amount of space the image is taking up on the hard drives of the K2000. The Package size is the size of the file that is created on the Samba share when the image is exported. The package will usually be smaller as an exported package is compressed. However, if the image is changed by removing tasks and not exported, it may be larger than the last exported package size, as last exported is exactly that - how big the package was the last time an export was done. The image will have a blue or yellow line (see the legend on top of the page in the UI) depending on whether the image has changed since the last export.
A K-image will be compressed when exported. As a K-image is not compressed when it is capture, which actually can save disk space on the K2000. Files that are the same (multiple images of Windows 7, for example, would all share the same core operating system files) are not duplicated and only referenced for each new image. This can save a great deal of space and also leaves a significant amount of space that can be saved by compression. A WIM image, on the other hand, is compressed when it is created. These save space, and download time, per image, but will have redundant files, as each image is a separate file.
The size and package size should not match as they represent two separate sizes, compressed and uncompressed, and possibly different versions of the image.
