Hello Chantelle,

I will send you the both the midi and the SGU files for you to test.

I made sure to start a new song in BIAB, set the key, set the last chorus at 160, Set the project tempo at 155 bpm and the imported the midi file. Assigned each track to individual Utility tracks and started to play the song.

It play much slower than the 150 bpm. If the tempo is increased to play at 150%, this is near to the original speed.
Hopefully this info helps you troubleshooting.