Did you try shifting them down towards the front of the machine by about an inch or so? (To see if it is the design or the placement.)
If that doesn’t work, check for something mechanical…the arm might be hitting something, or there might be something going on with a side belt. (You can watch a print and see if it bounces.)
Correct. The lid camera is only used for power-on centering of the head, and rough material placement. The “Calibration” procedure simply attempts to tune the latter.