Hi John,
Thanks for contributing to our forum. Our uploaders will typically compress each image file a bit during the upload process, resulting in a decrease in file size, and I am uncertain why your images may reflect larger file sizes once uploaded into your Auctiva account than on your hard drive.
If you are still encountering this behavior, please contact our Customer Support team directly from under the “Help” tab within your account and we will be happy to continue working with you on this.
We would need to have you email us a couple of the image files in question as attachments to see if we encounter the same behavior when uploading the images from our end, and hopefully we could figure out what is going on from there.
-Mike