Your document renders correctly. Attached is a sample document, with a pdf (dvipdfm) I made from it. (Save As..is grayed out in Yap. Why??)
Here is the outcome Right--Single--wrong Justified--Single Left--Single--wrong Center--Single--wrong Justified--Default Justified--Double Right--Double Right--Custom-3 Any thoughts? --Urijah
help.pdf
Description: Adobe PDF document
help.lyx
Description: application/lyx