Steps taken:
Opened job in custom layout editor (success)
Took cabinet into CE (success)
Went to door/drawer editor to remove doors (success)
Went to faceframe editor to remove a center stile (success)
Went to CE to change width from 36" to 16" (success - kinda
)Now the 2 adjustable shelves are sticking out the right side of the cabinet. It appears that they weren't re-sized when the cabinet was made narrower.