Hi John,
You're very welcome.
However, the dimensions of the full size (or "supersized") versions of your images should never be greater than they were prior to uploading them so I don't believe that would explain why you are seeing the 30% file size increase you described.
As such, I would still be interested in looking into this further if you email me a couple of the original image files with which you have experienced this behavior. Perhaps I just due not have a full understanding of the true nature of your report.
I hope you have a great New Year's as well!
-Mike