You may need to rearrange the order of the composites in your wall to match how you place your reference line in the model.
Typically people put the reference line on the exterior side of an exterior wall, but there are times when the reverse is done so the reference line is on the inside face.
Composites are arranged so that the top material in the list is the reference side of the wall.
Erika
Architect, Consultant
MacBook Pro Retina, 15-inch Yosemite 2.8 GHz Intel Core i7 16 GB 1600 MHz DDR3
Mac OSX 10.11.1
AC5-18
Onuma System
"Implementing Successful Building Information Modeling"