This makes no sense. If it was jamming twice an orbit why would he keep using Faded Spade? I know I wouldn't.The manufacturer lists a particular Copaq card to use. I know a guy that runs 2 games a week on a shuffletech and Faded Spade, it jams constantly, at least twice an orbit.
In the "Best Performance " section of the Operating Instructions it does say to use "the Copag Poker Sized cards supplied" & goes on to say "be sure cards are not bent or creased" & "be sure playing cards are not dirty or greasy."
My guess is these cards are bent or greasy or Bridge sized. Also might have dirty rollers/machine. Try cleaning the unit with some isopropyl alcohol.
I've talked to Chip@Shuffletech regarding brands & he says Faded Spade & Copag work the best! My 1st hand experience of about 3 years agrees 100%. (Only cards mine have not consistently liked are bent Kems & Dal Negro Treviso because they're too damn slippery)