Can you get mirrored contacts on the sphere arrays?

[Jace11]

A couple of times I'm sure I've been seeing mirrored contacts on non-towed arrays. They don't necessarily appear on the broadband, I picked them up on the narrow band on a reciprocal bearing from the real contact. I couldn't see any frequencies by eye, but the classification was coming though for two contacts that were on my other beam. The only explanation I could come up with was the presence of a number of terrain features at around 10nm off my starboard beam were reflecting a weak return back from the contacts on my port beam. These features are pretty hard to spot accurately on the map but dragging the cursor around there looked to be several changes of around 1200ft. So I guess this is a thing then...? Or my games bugged..