i did have the same issues that you are experiencing, has it been raining near you? im assuming that you usually get a straight line from which the binder takes the folded sheet the scuffing it happens when the paper that is in contact with the stainless steel table is drag by the grippers, this action makes that the ink that remain on the top of the sheet goes off the sheet and sticks to the table, and if you are putting more weight on the top of the folded sheets then you will increase the friction, and then you will have more problems, the way i solve this issue was as followed, first i bought myself some ph markers and some humidity testers, and started to measure every stock i got into the press, i didnt change any parameters for a while and the problems kept coming with this type of paper, first i check my fountain solution because from what i saw the ink wasn't being oxidized properly and the water i was using was completely out of parameters in terms of hardness even tho the Ph and the Conductivity was ok, i change it and it didn't work, my stock was about 80% humid and about ph values were around 6 or 5 this doesn't seem much but remember PH values are measured from a logarithm so then 1 point in ph means a lot!, i put the paper on some moisture removers, and change the parameters on my fountain solution to adjust the variation on the paper PH, this procedure did that the problem was solved, i ask you if it was raining near your facility, because usually those factors affect the paper quality and then the impression, i did tried some dryers and other stuff to make this thing work but nothing really worked unitl i did what i described.
Hope this helps
