The collision at the bases of Land_Construction_House1 and Land_Construction_House2 extends out further than the visual base of the object creating an invisible barrier. When you go to vault up on the misaligned sections it prevents you from vaulting on Land_Construction_House1 on the affected side. On Land_Construction_House2 it lets you vault up onto an invisible "ledge" that extends out beyond the visual edge on two sides of the structure. If you go to walk off the affected side on both objects you basically walk down an invisible ramp. See attached clips.