I save a PDF copy of the shopmetrics report just before I submit it, so I have exactly the same info I put on the form. I also download the guidelines before I do the shop. I save everything in a folder on my desktop with everything else associated with the shop location--photos, receipts, marketing materials, all.
I do something similar on other shop forms. Most of the Sassie companies set it so you can download a PDF of the shop you've just submitted, but I make a PDF before I submit, just in case. Other companies will generate a PDF for you before you submit, and send a copy to your email after you submit.
Doing this keeps disagreements to a minimum. I'll know if it was I that screwed up, of if it was someone else.
I have had the experience of an editor complaining about a change that, unknown to them, an earlier editor had made, but which made the narrative unintelligible. Showing exactly what I submitted goes a long way toward resolving issues. Also, I've had situations where the guidelines were switched after I finished the shop, only to have the editor expecting the shop to adhere to the new guidelines. That's why I always make a copy of the guidelines when I accept the shop, and check for changes the morning of the shop.