Feature Definitions in 3D Model

I am having an issue where originally I assigned a Feature Definition of Grade_Fill to a 2:1 fill end condition in my template.  It displayed as green in my 3D model space.  I then decided to assign a Road_Rip_Rap Feature Definition to the 2:1 component in the template to display it as grey (to more accurately display concrete rip rap).  

I resynched my template drop and reprocessed my corridor but the 2:1 fill component still has the Grade_Fill Feature Definition instead of updating to the Road_Rip_Rap Feature that is assigned in the template.  

I can manually change it to the Road_Rip_Rap Feature in the 3D Model space but as soon as I resynch another template drop in the same corridor, the 2:1 component reverts back to the Grade_Fill Feature Definition.

Any thoughts as to why this is happening?

Thanks.