End Condition Issues

Hi there,

Ive build two templates for a 30 km  freeway project im currently running. 

1. Single Carriageway with various end condition cases 

2. Dual Carriageway with various end condition cases 

 Both templates are relatively basic.

When i run templates, Ive found that my cut/fill slope banks get 'confused' over certain short sections of the roadway. ie left bank slope ties to terrain on right side and vice versa. These sections are typically 20 m -200 m long.

e.g Chainage 420.00 illustrated below.

3D rendering shows cut slopes running to opposing sides...

Has anyone experienced similar problems? is it my template?.....test seems to work perfectly.