Fix ordering of line items created using AJAX form.
Fix ordering of line items created using AJAX form.

xuewenfei/bookyt,gaapt/bookyt,wtag/bookyt,huerlisi/bookyt,silvermind/bookyt,gaapt/bookyt,gaapt/bookyt,silvermind/bookyt,hauledev/bookyt,silvermind/bookyt,hauledev/bookyt,xuewenfei/bookyt,huerlisi/bookyt,xuewenfei/bookyt,silvermind/bookyt,wtag/bookyt,gaapt/bookyt,huerlisi/bookyt,hauledev/bookyt,wtag/bookyt,hauledev/bookyt