No improvement after completing foundations section

I just took another PT after my benchmark. Between the times, I have only finished the foundations section of the course and have done minimal drilling. I studied my wrong answers for my benchmark exam too before taking this exam. I saw a ZERO score raise after taking this 2nd PT. Is this common or is this a sign that I have been studying wrong?

Would love to know if anyone else has had a similar experience or if this is common. Any tips or suggestions would really help.