OK, so the distortion looks like a problem with a station name – look around the black or yellow dots. If you fix that perhaps the scrap with stations will work.
Very often this problem is due to double stations (with different names) in the same place or misplaced station.
In this case it looks as the length (or clino) of centerline shot is not correct (horizontal projection is too short). Maybe a typo? Yellow dots are positions of stations in sketch, black dots are positions of stations after calculation of centerline and loop closure.