Most of the very clear wet sheet transfers are actually cylinder impressions.
The inked plate prints to the offset blanket, and that prints to the cardstock or paper, backed up by the impression cylinder, basically a smooth steel roller. Without it, imagine the difference between using a rubber stamp on a paper placed on a desk compared to a paper you're just holding.
If there's a misfeed, or some other reason the press runs without a sheet being between the offset blanket and the impression cylinder the offset sheet prints to the impression cylinder.
The next sheet, possibly more, but at a minimum the next sheet gets pressed against the impression cylinder by the offset blanket (Loads of force there!)
And that prints to the reverse side of that sheet.
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