While NOT logged in and under the 'QUICK MIX' tab:

If you have a Quick Mix ID from previous mixes enter it here, or if you want to check the status of a Quick Mix in progress enter it and use the button on the bottom of the page.

I scoured this entire thread and all the documentation available on your website, and no where is the function of the 'Quick Mix ID' explained anywhere.

How does the 'Quick Mix ID' function? Does it ensure that I can continue to reuse the 'QUICK MIX' function without ever mixing in with previously mixed in coins?
Does this ID function track previously tumbled in coins? If so, to what degree?
Is the 'Quick Mix ID' used only for tracking the tumble function while in-progress and immediately after for support?