What version of BIAB are you using (what build number)?
I think that there was a problem earlier (a couple of years ago) where sometimes the songs didn't play in the correct/expected order, but I think that was resolved.

As a thought, try renaming the songs to start with a number, such as
1_MyFirstSong
2_MyNextSong
3_MyNextSong
4_etc


BIAB & RB2025 Win.(Audiophile), Sonar Platinum, Cakewalk by Bandlab, Izotope Prod.Bundle, Roland RD-1000, Synthogy Ivory, Kontakt, Focusrite 18i20, KetronSD2, NS40M Monitors, Pioneer Active Monitors, AKG K271 Studio H'phones