Delete a Breakline from a Terrain Model Imported from Inroads

I have a terrain model that I created from a .DTM. I have some errant breaklines that were included in that surface that I need to delete. Unfortunately when I use the edit terrain commands it deletes all of the breaklines instead of just the ones I need. I've also tried remove features and again, it deletes them all. I'm wondering if that by importing them from inroads they were somehow grouped together. It really seems that a lot of inroads commands that were easy to use and self explanatory have been removed for some reason. Am I overlooking them or something?