OpenRoads Designer - Corridor Contours Do not Tie into Existing Contours

Hello. 

I am having issues getting the proposed contours from a corridor to tie into the existing contours. Please see the screenshots and scenario below. 

At STA 736+10, the End condition seeks and ties to the existing surface as desired. *Note How the proposed contours tie into the existing contours prior to STA 736+10 (left of the vertical cyan line)

At STA 736+12.5, the end condition does not tie to existing surface. This results in the proposed contours to the left of the cyan line not tying into the existing surface. This is the case from STA 736+10.01 to STA 736+14.99.

At STA 736+15.00, the end condition ties back into existing surface. 

Ultimately, I need the proposed contours on BOTH sides of the red notch to tie into the existing surface. There appears to be a 5ft section (between STA 710+00 and 715+00) where the end condition does not solve to existing surface. My template interval is 5ft. I have tried changing to the template interval with no luck. I have also tried adding Key Stations with no luck. 

If anybody has any thoughts that could lead to a solution, I would be VERY grateful.