I have noticed that construction lines are interfering with the offset command. Often times I will layout construction lines, constrain them, then trace over with object lines. Then if I have to offset the object line it will not select the entire profile unless I delete the construction lines (then it works perfectly). It's like it doesn't know the difference between the construction and object lines.
Has anyone else noticed this. Unless I am missing something, it makes construction lines useless if you need to use the offset command.
kp