That sounds like a new peak of incompetence for Russians, if true. I mean, sure, the pipelines are kinda close to each other, but not that close, surely?
I would expect any means of attack that can reach the Nord Stream pipes near Bornholm, to be capable of hitting the other pipe, too, and with the naval base in Kaliningrad it doesn't seem too difficult to pull off, but for them to mix up the pipes? If that's the way their operations are run, I'd expect the next New Year address to the nation from the Kremlin to be delivered in Ukrainian.