I have one more question. I created a lineinit script that populates two field values. The issue is the initial line created is not populating the two fields. What is the best way to fix this?

Put the same logic in the page init event. Then use record.selectLine

what do you mean by the same logic in the pageinit event? do I need to check for the current line?

You need to select the first line in your pageInit function, after selecting the line you can set the line field values like you do the lineInit function