I think I had this issue momentarily, but it seems resolved. Keep in mind that any time you change your scanning environment (new light added, more sun from a window, etc) it’s a good idea to re-run the wizard and possibly other advanced calibration options. The Camera Intrinsic calibration is completely optional and BQ suggests that the defaults should be more than adequate - I’d skip that one.
For the overlapping lines have you tried the Laser Calibration?
Once it’s complete you can review how Horus is interpreting the laser data. According to the docs, the numbers you see in the calibration screen on the right (in the viewport box) “values around 0.1 are adequate”. On the left hand side the values in the top box (should be ~= 162.123456, etc) should not have a difference of greater than 30 units.
Does your calibration show a difference of greater than 30 units?