Welcome to the forums!
Have a read through my posts in the the below thread, it should help. About halfway through the thread, I explain more fully how I created a chord sheet with repeats.
http://www.pgmusic.com/forums/ubbthreads.php?ubb=showflat&Number=351518&page=1Also, keep in mind that DS, DC, repeats, etc. are conveniences for music notation and, as such, are a way of minimising the number of pages that it takes to write a song. If a song was fully scored for orchestra, it would be very unlikely that it included repeats, etc.
BIAB is like the full orchestra score. It creates a backing that plays from beginning to end. This is how I personally choose to use the program. I layout a song as a single 'once through' (BIAB calls this 'once through the entire song' a single chorus). Copying and pasting of repeated sections makes it very easy to layout a song in this linear format.
From a BIAB perspective, repeats (etc.) are tool that is used with Fakesheet mode and is primarily used for the creation of leadsheets. It can certainly be used with the chord sheet, too, though.
Lastly...
The video clip below is on PG Music's Youtube site. It is a tutorial on using repeats.
https://www.youtube.com/watch?v=mYpI7G_bmWwAlthough the video shows an earlier version of BIAB, the process is the same today.
Hope this helps,
Noel