Yes, you can go back to the form and you can click on publish again, but you can't really update the data once it has been saved. However, you can go back to the page before that form and that will trigger another entry. But that's basically the same thing as running the test again and getting the same results. I agree that it's not 100% satisfying, but i'll leave it like that for now and see what happens.
The units of cpu clocks is up to you. I don't want to use this data for anything but displaying it, so i don't care about the actual format. "Very high" would be a valid entry too.
About the user/device aggregation...it's too much hassle for me ATM. I wanted to get this thing done as fast as possible. Maybe i'll add it later.
Thanks for uploading your results. Makes me think that the upload basically works...