I'm trying to enter a song into BiaB but have encountered a problem of too many chord change. It is 4:4 time. As far as I know BiaB will let you put 4 different chords in a bar--one for each quarter note. But this song sometimes changes chords with every 8th note. I don't know how to deal with this.

See photo of music:
https://imgur.com/a/0xbvfto