Seeking Feedback on Kaplan's Live & On Demand Course

I began studying for the Series 65 in mid-January. I have been reading each chapter in Kaplan's license exam manual, taking notes, listening to the TestGeek video, and taking a 30 question Kaplan Qbank quiz. My scores average in the high 70s. I work in healthcare with a schedule that provides both benefits and challenges to studying for this exam (7 days of work (long hours), 7 days off). I cover several chapters each week during my weeks off. The issue I am running into is when I test myself (via 10 question Qbank quizzes) on information I studied in prior weeks, my retention/recall is poor and I fail them. I have almost finished reading the manual (5 chapters to go) and am wondering if anyone struggled with the same issue and used Kaplan's live & on demand course to review and enhance recall & retention? I saw there is a course scheduled for 3/16-19 and am considering registering for it. I was planning to take the exam in early to mid-April but can push it out if needed. I appreciate any feedback!