I recently installed the latest NAM and have found a bug that creates a hole in the ground at the of the off ramp when placing elevated road puzzle pieces.This seems to happen intermittantly as it is possible to place off ramps successfully. Another thing I've found is that there are no 45 degree curves to transition from the straight sections to the angled sections only 90 degree curves.Is something missing from my install or is this something to be included in a future version of the NAM?